Xcode 10 Error Multiple commands produce

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error  Multiple commands produce   Users uesr Library Developer Xcode DerivedData OptimalLive-fxatvygbofczeyhjsawtebkimvwx Build Products Debug-iphoneos OptimalLive app Info plist         1  Target  OptimalLive  has copy command from   Users uesr Desktop workSpace SEALIVE SeaLive1 1 OptimalLive Info plist  to   Users uesr Library Developer Xcode DerivedData OptimalLive-fxatvygbofczeyhjsawtebkimvwx Build Products Debug-iphoneos OptimalLive app Info plist        2  Target  OptimalLive  has copy command from   Users uesr Desktop workSpace SEALIVE SeaLive1 1 OptimalLive Server Masonry Info plist  to   Users uesr Library Developer Xcode DerivedData OptimalLive-fxatvygbofczeyhjsawtebkimvwx Build Products Debug-iphoneos OptimalLive app Info plist        3  Target  OptimalLive  has process command with input   Users uesr Desktop workSpace SEALIVE SeaLive1 1 OptimalLive Info plist    Running the code in Xcode9 works  but there is a error in Xcode10

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I had bunch of Multiple commands produce warnings - not limited to info plist duplication in one target  Including localized resources and string files  headers etc   Solution  remove all duplications in target membership

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In my case  I m using Carthage  the problem with  error  Multiple commands produce  1  Target     has copy command from 2  That command depends on command in Target      script phase    Run Carthage Script       was caused due to importing frameworks both to  Embeded frameworks and Run carthage script  phases in Build Phases configuration   These 2 phases copy frameworks to derrived data  so Xcode see duplicated files and print these errors with warning   ignoring duplicated output file   in target        After removing duplicated frameworks from Embeded frameworks phase everything is working correctly

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For me the problem was tied to having the same file included in the bundle resources twice   Not sure how that happened  but I removed one of them and it compiled fine with the new build system

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My problem was a duplicate Product Module Name for both the Action Extension I created and the main target  The solution was changing the Product module name  Under Build Settings  for the Extension    XCode 11

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In my case an Info plist file was scooped up from one of my Cocoapods  Deleted it and solved the problem

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error  Multiple commands produce   Users KunshtechNew Library Developer Xcode DerivedData chat21-fgjaqebxysmggqfdnetggdbzfqih Build Products Debug-iphonesimulator Chat21 app Base lproj Chat strings   1  Target  chat21   project  chat21   has copy command from   Users KunshtechNew Downloads chat21-ios-demo-master TildeskWidget Chat21Core Base lproj Chat strings  to   Users KunshtechNew Library Developer Xcode DerivedData chat21-fgjaqebxysmggqfdnetggdbzfqih Build Products Debug-iphonesimulator Chat21 app Base lproj Chat strings  2  Target  chat21   project  chat21   has copy command from   Users KunshtechNew Downloads chat21-ios-sdk-master 2 Chat21Core Base lproj Chat strings  to   Users KunshtechNew Library Developer Xcode DerivedData chat21-fgjaqebxysmggqfdnetggdbzfqih Build Products Debug-iphonesimulator Chat21 app Base lproj Chat strings    There can be 2 different solutions to get rid of this problem   Solution 1  As We can see I was getting the same error   in my case there was an extra copy of the folder Chat21Core in TildeskWidget folder   This was creating issue   So one of the possible solutions can also be just read the error entirely  and try to find if there is any extra copy referenced from project or not   Solution 2  Another simple solution I found when I face same type of issue for different project  This time I had to apply different solution    pod deintegrate from the project  Remove the workspace file and pod lock file from the project folder  Again pod install and try to build the project    Hope this might work for you

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OK so for anyone who hadn t found correct answer here because it has nothing to do with info plist     I ran into this problem while I was developing a macOS app without CocoaPods or Carthage  just with SPM packages  manually dragging xcodeprojs into workplace   When I was using only one dependency  it was using Swift-NIO from within   everything was OK  but when I added one more one more dependency with overlapping subdeps  I got this nasty problem   The solution is to try to compile all major dependencies separately  it would fail due to unexisting checkout folders within respective  build folders  and this is most probably happened because you put your pkgs in edit mode  swift package edit YourPkg        You just unedit your pkgs  and force all dependencies to compile successfully  After that you must make sure that your linked binaries within main target aren t overlapped  I m not sure it s really necessary  but just in case    After that everything should be working just great

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In my case I had a modified watch project where the app and the extension all had a info plist files  all named with the same name   to solve this I have renamed the files for the ios app I left it as info plist for the watch I have named it watch info plistand so on After that I have modified the  project- target- build settings  under packaging info pilst and modified the plist file name accordingly  that solved it for me  note that I saw in other places to changed the build system from new to legacy under project workspace settings  Although it works - I do not recommend this as it causes other issues down the road

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In my case  I had the same custom Public Header Folder Path for two different static libs  One was for a main app another for a watch app  Changed the path for the watch app and now everything is fine

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This basically means you have multiple files named Info plist   Usually it s fine  but accidentally yours files are set to the same Target Membership  So the fix is  click each each file and check their Target Membership on the right  make sure they don t overlap

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In my case PDFGenerator was producing an info plist file  I just deleted it

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Before I begin note that my project utilizes Carthage as a dependency manager    None of the existing answers here resolved my issue  What did resolve the issue for me was the following    First  I noticed that the build error pointed out one framework in particular  Next I filtered App Target   Build Phases for that framework  I noticed that that framework was present in both  Link Binary With Libraries  and  Embed Frameworks   Noting that none of the frameworks listed under  Embed Frameworks  were ones managed by Carthage I removed the framework in question from  Embed Frameworks   I then re-built my project and everything works fine including the functionality enabled by the framework in question

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I using Carthage and Xcode 10   My Solution is -  Project -  Target -  General -      Remove the Frameworks added with Carthage from  Embedded Binaries    usualy u have to add a script in Build Phases to strip the architecture for app store   In Xcode 10 the script seems called always  So it copies the frameworks to the right place and you don t have to add them to the General Tab   Note  if not set -  in Build Settings -  Search Paths -  Framework Search Paths -  set the path to the Framework u added with Carthage      eg      PROJECT DIR  Carthage Build iOS

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Unfortunately none of these answers worked for me    here was the error I was seeing   quot Multiple commands produce   Users             Frameworks abcdef framework quot   That command depends on command      script phase  quot  quot  That command depends on command      script phase  quot  quot   Adding this line to the Podfile and doing a  quot  Pod Install  quot  was the ONLY thing that worked  install   cocoapods    disable input output paths   gt  true  I really hope this helps someone  I spent hours trying to fix this and finally got it  Sometimes I just wish Xcode was as efficient as IntelliJ   Android Studio    Goodluck

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Go to Xcode -  File - Workspace Settings  You will find one pop up like     Select  Legacy Build System  from Build System tag  Press on  Done    Note - Make sure clear your project with  cmd shift alt k  and  Derived Data   Build your project it will work charm

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Here is another working solution    If you are using custom Pods    Select  Pods  from sidebar as highlights in screenshot  Click on Build Phase  Expand  Headers  section  There are 3 options Public  Private  Project Expand Public and check there are duplicate files  Remove it  DONE

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In my case  I added GoogleService-Info plist file twice disappointedly to my Firebase project    I delete first added GoogleService-Info plist and problem solved

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If you use CocoaPods you may want to try deintegrate the pods and install again  It works for me   pod deintegrate  pod install

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Actually you can use legacy build system but you wont get the speedy build times i e  u won t get the new build systems features which have been made default in XCode10 It is just a workaround  for not getting the latest build features https   developer apple com documentation xcode release notes xcode 10 release notes build system release notes for xcode 10

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Try this as well  Xcode- File- Project Settings-  Build System -  Legacy Build System

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Read this answer if error message references Core Data files  Synopsis  You may have both automatically-generated and manually-generated Core Data managed object class files   This answer applies if the first line of the error refers to a Foo CoreDataProperties o or Foo CoreDataClass o file   Example   error  Multiple commands produce   Users me Library Developer Xcode DerivedData MyApp-uebslaqdwgldkjemijpdqmizgyzc Build Intermediates noindex  MyApp  Debug-iphonesimulator  MyApp build Objects-normal x86 64 Foo CoreDataProperties o    1  Target   MyApp    project   MyApp    has compile command for Swift source files  2  Target   MyApp    project   MyApp    has compile command for Swift source files  The root cause can be seen by expanding the Compile Swift Source Files section of the Build Transcript   For example    lt unknown gt  0  error  filename  Address CoreDataClass swift  used twice    Users myUserName Projects Jnky Foo CoreDataProperties  and   Users jk myUserName Developer Xcode DerivedData MyApp-uebslaqdwgldkjemijpdqmizgyzc Build Intermediates noindex MyApp build Debug MyApp build DerivedSources CoreDataGenerated Jnky Foo CoreDataProperties swift    The first file mentioned there is a source file in your project directory  which someone generated by selecting your data model in the Project Navigator and clicking in the menu Editor   Create Managed Object Subclass   This feature was added in Xcode 7 or so   The second file is a file of the same name but which is buried in Xcode s DerivedData   This file is generated automatically by Xcode during every build if the data model   xcdatamodeld  file is included in the target s Compile Sources build phase   This feature was added in Xcode 9 or so   Zero  one or two files are generated for each entity class  depending on the setting of the Codegen popup  That popup is in the Data Model Inspector when you select an entity while editing your data model       The settings are    Manual None No files are generated Category Extension One file  Foo CoreDataProperties m or  swift is generated  containing an Objective-C category or Swift extension  Class Definition That same Category Extension file is generated  and in addition a Foo CoreDataClass m or  swift is generated  containing class declaration and definition    So you see the problem occurs when a developer  like me  who is accustomed to the older Xcode begins a project in a newer Xcode   We think that we need to use the Create Managed Object Subclass menu item  which we do  to create the files we can see in the Project Navigator while not realizing that our settings in the Codegen popup are causing Xcode to create duplicate files  which Apple  cleverly  does not show in the Project Navigator  because they don t trust developers to read and heed the comment in the header     This file was automatically generated and should not be edited   Solution 1 - Use the Older Way  You can disable all automatic Codegen for a data model with just one setting    Open the problem Target s Build Phases  In Project Navigator  select project  then in list of TARGETS which appears  select the problem target  then tab Build Phases   Expand the Compile Sources entry and find the problem data model   xcdatamodeld file   Delete it from the compile list Ensure the data model is included in the Copy Bundle Resources list    Solution 2 - Core Data Magic For Beginners  Here  you go all in on the newer way    Leave your data model as is in that Compile Sources  In each Entity Inspector in your data model  set Codegen to Class Definition  In the Project Navigator  delete and trash any Foo CoreDataClass files  and rename any Foo CoreDataProperties m or  swift files to something like Foo MyProperties  In each Foo MyProperties m or  swift file  if there are properties generated by Xcode  delete these properties because they will be in the hidden files created by Codegen    With this solution  your class definitions are generated automatically from the data model on each build   You can t even see them   It is Core Data Magic  nice and simple for beginners   Solution 3 - For Most Real-World Apps  But Solution 2 is no good if you really want to add non-managed properties    Objective-C does not allow properties to be added in categories  and Swift does not allow stored properties to be added in extensions    So in most real-world apps  you probably want to go halfway between Solutions 1 and 2      Leave your data model in the list of Compile Sources In each Entity Inspector in your data model  set Codegen to Category Extension  In the Project Navigator  delete and trash any Foo CoreDataClass m or  swift files  and  to reduce future confusion  rename any Foo CoreDataProperties m or  swift files to maybe just Foo m or  swift  Ensure that each Foo m or  swift file contains the class definition  to which you can add your own non-managed properties     Acknowledgments to the answer by Positron   My answer here explains why Positron s answer  my Solution 1  works  and adds Solution 2 and Solution 3

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I was experimenting with Core Data   I built a data model for a simple checklist program and generated the NSManagedObjects   When I compiled the project I got the following error    error  Multiple commands produce   Users myUSerName Library Developer Xcode DerivedData myCoreDateExperiment-gzbslaqdwglkzxemijpdqmizgyzc Build Intermediates noindex  myCoreDateExperiment  Debug-iphonesimulator  myCoreDateExperiment build Objects-normal x86 64 CheckListItem CoreDataProperties o   1  Target   myCoreDateExperiment    project   myCoreDateExperiment    has compile command for Swift source files 2  Target   myCoreDateExperiment    project   myCoreDateExperiment    has compile command for Swift source files   The problem was the data model  CheckList xcdatamodeld in my case  was in the  Compile Sources  list   The project compiled cleanly when I removed it from the list      Open the project navigator and select the project  very first entry at the top  Select your build target under Targets in the  Projects and Targets  pane Select Build Phases option near the top Expand the  Compile Sources  entry and look for your data model name   Search for  xcdatamodeld  if you have trouble finding it    Delete the model from the compile list Make sure the data model is included in the  Copy Bundle Resources  list   Add it if it is missing      EDIT  As  WilliamT  explains in the comments  you need the xcdatamodeld in the compile list  Instead  go to your entities within the xcdatamodeld file  Select the models that are erroring  expand the left panel  and change the field of  Codegen  to  Manual None

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While checking the build log  I noticed a warning   note  Using new build system note  Planning build note  Constructing build description Build system information warning  The Copy Bundle Resources build phase contains this target s Info plist file   Users  lt redacted gt  Repositories Whitesmith optimize-ios Carthage Checkouts WSStatusBarNotification Miscellaneous Info plist    in target  JDStatusBarNotification     So  if that s your case then just go to your target    Build Phases Copy Bundle Resource Remove info plist

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If your app is generating the error related to the multiple  app files then removing the  plist files from  Copy bundle Resources  WILL NOT WORK   If the error is related to  app file then follow the following steps   Select the Target    Go to Build Phases tab  Remove the items listed in Output Files Compile the code if it compiles successfully then not follow the next steps  If code does not compile successfully and Xcode may give you an error related to  Library not found   Then add the missing library in General Tab in Linked Frameworks and Libraries that Xcode mentioned in the error  Keep adding these libraries  that Xcode ask through compile errors  in Linked Frameworks and Libraries until the code compiles successfully   Hope this helps

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None of the solutions proposed here worked for me  This was particularly due to CocoaPods  I was previously using Cocoapods 1 3 1  Simply upgrading to 1 5 3 didn t resolve the issue right away   The steps I followed were    Delete Podfile lock Delete Pods directory Delete Derived Data  amp  Clean Exit Xcode Update CocoaPods to 1 5 3 Run pod install Open workspace and build

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In my case  Build archive error vs Xcode10     -1  Multiple commands produce   Users kk Library Developer Xcode DerivedData react carday app-hjahojxsbvmmiyaklrhhuqljdfwv Build Intermediates noindex ArchiveIntermediates react carday app IntermediateBuildFilesPath UninstalledProducts iphoneos libyoga a     1  Target  yoga  has a command with output   Users kk Library Developer Xcode DerivedData react carday app-hjahojxsbvmmiyaklrhhuqljdfwv Build Intermediates noindex ArchiveIntermediates react carday app IntermediateBuildFilesPath UninstalledProducts iphoneos libyoga a    2  Target  yoga  has a command with output   Users kk Library Developer Xcode DerivedData react carday app-hjahojxsbvmmiyaklrhhuqljdfwv Build Intermediates noindex ArchiveIntermediates react carday app IntermediateBuildFilesPath UninstalledProducts iphoneos libyoga a    There should something like bellow in your Podfile  post install do  installer    installer pods project targets each do  target      if target name     React        target remove from project     end      if target name     yoga        target remove from project     end   end end   and then run pod install

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The duplication of Product Name may also cause the same problem  especially when you are creating more than one extension target in a single workspace  Make sure you also check Product Module Name according to  Lirik  s answer

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For those using React Native and Cocoapods The issue was produced by some libRN   a files  I fixed it by removing some of them like libRNScreens a and libRNGestureHandler a from Build Phases - gt  Link Binary with Libraries since they were already being referenced from another libraries  Others had to be replaced by their Pod version like libRNDeviceInfo a

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I had the same problem but where able to fix it by removing the associated  png s and the icon asset catalog and then build the app  That generated expected errors as assets were missing  After than I added everything again and build the app with no problems

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My situation was similar to the Damo s one - some Products were added to the Pods project twice  The structure of my Podfile was     platform  ios   11 0    def shared pods   use frameworks    pod  SharedPod1  end  target  Target1  do   pod  SomePod1    shared pods end  target  Target2  do   shared pods end   and all shared pods were added twice  Uncommenting of first line and then pod install solved the problem

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Remove the damn Assets file  Solution -  Open target -  Build phases   Copy Bundle Resources and remove Assets from there

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This answer is deprecated - XCode 12 has deprecated the Legacy Build System  it will be removed in a further release  I m using XCode 11 4 Can t build old project Xcode   gt  File   gt  Project Settings   gt  Build System   gt  Legacy Build System

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Try all this option anyone of this 3 option will work for you  for sure  Option 1  Remove all files from      Target    Build Phases    Compile Sources      Target    Build Phases    Copy Bundle Resources   Option 2  Change the build system      Xcode- File- Project Settings-  Build System -  Legacy Build System   Option 3  remove and update existing pod      pod cache clean PromisesObjC   pod cache clean PromisesSwift   cd  your project dir    rm -rf Pods    rm Podfile lock   pod update      I hope this will help you  Happy coding  -

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For dependency projects managed by cocoapods  solved the problem by providing a local podspec to exclude info plist from sources  Take godzippa as an example  Podfile  pod  Godzippa    podspec   gt   venders godzippa podspec    venders godzippa podspec  s source files    Sources    h m

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1- Remove DerivedData For all Apps 2- Open Terminal 3- Update Pod Every thing Done

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For people who rely on names to be the same for Swift header imports   Ex  header file name   import  MyApp-Swift h     This header file s name is actually determined by   SWIFT MODULE NAME -Swift h where SWIFT MODULE NAME uses PRODUCT MODULE NAME as the default value    Moreover  there is a build setting that is project-wide called  SWIFT OBJC INTERFACE HEADER NAME    Objective-C Generated Interface Header Name    and it s default value is   SWIFT MODULE NAME -Swift h  By changing this value to MyApp-Swift h all targets within our aggregate build were able to share the same header name and from them we were able to change the PRODUCT MODULE NAMEvalue

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In my case  I had imported files from another project and had the same class in two locations    I had the following related error message   When I copied the error  it turned out to copy a lot MORE textual information  and when I read through the dump  I came to the relevant line    0  error  filename  EventNode swift  used twice    which was followed by the locations and allowed me to eliminate the problem   In the process  I found out what needs to be in  Copy Bundle Resources     Main storyboard Assets xcassets any SpriteKit scenes   sks  your project uses

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Had similar issue but with  swiftdoc files   I have extensions and unit test targets in project  And they had same  Product Module Name   PRODUCT MODULE NAME in Build Settings  as application  After making names unique issue gone

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If you develop private cocoapod  and had already added it via Podfile   remove it from Embedded Binaries section

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If you are manually making your entity s CoreDataClass and CoreDataProperties  make sure you go to your xcdatamodel and set the Codegen in the inspector tab to  Manual None   Xcode will automatically create a duplicate class for you if this is set as  Class Definition

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Solution 1   In Xcode  go to File     Project Workspace settings     Change the build system to Legacy Build system  Solution 2    Open target     Build phases     Copy Bundle Resources     remove info plist from there      you will have to remove the plist from the Extensions too  if any   Solution 3   If you use CocoaPods you may want to try deintegrate the pods and install again  Commands  1  pod deintegrate 2  pod install

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I found the solution for this build error  for anybody else having the same issue with Xcode 10 build system  follow the following steps to fix it         In Xcode  go to File- Project Workspace settings    Change the build system to Legacy Build system        It will resolve the build issue with the new Xcode 10   If you want to work with the new build system  then you can find the troubleshooting help from this apple Xcode help page   Hope this helps

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If you are getting this from the Ditto command creating multiple instances of the same name  NOT the  copy files  build phase   you may have to change the Product Module Name    Click on your Target s  Xcode is complaining about Click on Build Settings Search for Product Module Name Change the name to something unique   We have a watch target and a few notification targets in our app  so I just put things like Extension on the end of the module name   I found this solution originally here  https   forums developer apple com thread 103913

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Moving to Xcode 10  errors like   error  Multiple commands produce   Users uesr Library Developer Xcode DerivedData OptimalLive-fxatvygbofczeyhjsawtebkimvwx Build Products Debug-iphoneos OptimalLive app Info plist     can be solved as follows   Go to Xcode- gt File- gt Workspace Project Settings- gt  Build System - gt  Legacy Build System

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I had the same problem  I had a one more helper app in main App and copy this in resource  In my case solved as  -  1  Target -  2 Build Phases 2  Copy File  n items  3  Remove Copy File   The Helper app automatically copied in Xcode 10 0

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My ProjectName xcodeproj had a valid and an invalid reference to a file with same name  Same filename in the project navigator  one filename was red  the other okay  I got rid of the invalid reference one  the red one   issue resolved

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The issue might be occurring because of multiple Plist or other files within App-  Solution -  Open target -  Build phases   Copy Bundle Resources and remove info plist from there      Note  If you have developed a watch app too then you will have to remove the plist from the watch and watch-extension too

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Go in Project Build Phase and Remove info plist from the Compile Sources  It will remove that issue and project will be active again

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My issue was in Xcode 10 being run in Mojave  and while trying to run unit tests that I wrote before updating to XCode 10   In my case  I had this issue while running my TestTarget target  To resolve  I had to    Delete one of the target dependency  in TestTarget  gt  build phases  gt  Target Dependencies     since I had two other targets besides my TestTarget and both were running the same script and creating copying files at a certain point   And that conflicted with what was mentioned in Build System Release Notes for Xcode 10 here      It is an error for any individual file in the build to be produced by more than one build command  For example  if two targets each declare the same output file from a shell script phase  factor out the declaration of the output file into a single target    New UPDATE after I updated from Xcode 10 1 to 10 2  Similar issue again showed up after I updated to Xcode 10 2  I have multiple targets in by project  Target1 and Target2  and I solved this issue by    navigating to Edit Scheme  gt  Build and  removing one of the target from being built  uncheck the checkbox of Target1 under Test since I knew Target2 imported Target1   Also to note here  Target2 s checkbox is to remain checked under Test

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Check your supported platforms   We spent months looking into this issue with several our of child projects  We found that AVAILABLE PLATFORMS was being set to  appletvos appletvsimulator iphoneos iphonesimulator macosx watchos watchsimulator  which was causing multiple platforms to be built  which would lead to the  Multiple commands produce error   For instance   Foo  platform was building for both iOS and TVOS  and thus multiple build commands were creating a Foo framework file   As soon as we set  AVAILABLE PLATFORMS   iphoneos iphonesimulator   in our root xcconfig file  this problem went away all child projects   To check your config  Run  xcodebuild -project FitbitMobile xcodeproj -target  FitbitMobile  -showBuildSettings  gt  BuildSettings txt   See if the output is being set to what you d expect  If you re an iOS app and you re building for tvOS  you ll want to update your config

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So the problem I was having is that I had accidentally included the Info plist in the project settings -  Build Phases -  Copy Bundle Resources for my target

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In Xcode 10  it will work on previous version too   Double click on project You will see image like below select TARGET from left Expand Copy Bundle Resources  0 items  Remove corresponding file which produces the error

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After setting Xcode   gt  File   gt  Project Settings   gt  Build System   gt  Legacy Build System I just removed duplicate files  That s it

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Try this Its Working    In Xcode  go to File- Project Workspace settings   Change the build system to Legacy Build system

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Sometimes the reason for this problem is that you have multiple targets that have different iOS deployment target  just check that your targets for example your main app target and your extensions  have the same iOS deployment target

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I had the same issue with a plist  Turns out I had two copies of it  one was empty and one was in my localized resources folder  Removing one of them  the empty one  solved the issue   If you check your error  lines 1  and 2  have different paths  You likely have this file defined twice in your copy phase   Check your target properties  Build Phases  Copy Bundle Resources  and look for a duplicate info plist  Figure out which path is incorrect and remove it   You ll probably want to delete it from the filesystem also

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One option which solved my issue is to changing build system to legacy build system  Please follow the following steps in Xcode 10    Here I have written a detailed article on the problem  amp  its solution  Xcode Error  Multiple commands produce

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This issue arose for me after adding a second part of the Fabric suite of SDKs to the app   What actually happened was that the GoogleUtilies Framework was added twice to the Pods project    This would have been fine prior to Xcode 10 but Xcode 10 will complain if a file has two actions against it  in this case a copy action    It s safe to remove the second framework

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I got the same problem but with the header files      In this case the solution is to move headers from  Public  to  Project  section

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I had multiple copies of same file  Simply  keep one copy and remove all remaining  Clean Build  and issue sorted

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Commenting use frameworks  in PodFile worked for me    use frameworks    Note  Did this on XCode 10 1  pod version 1 8 4

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If the issue with your error is  app   and not  app Info plist  see this answer here  xcode 10 error  multiple commands produce - react native

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One of my CocoaPods was oudated and caused the issue  Did an pods update and it worked fine   I believe it may have been the LivePerson SDK

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Same here but here is the latest solution May 2020  It looks like a bug or some new issue with new Xcode version   Error response is   Failed to build iOS project  We ran  xcodebuild  command but it exited with error code 65   Detailed response   Build system information error  Multiple commands produce   path of the project ios build NameOfTheProject Build Products Debug-iphonesimulator NameOfTheProject app Zocial ttf    1  Target  NameOfTheProject   project  NameOfTheProject   has copy command from   path of the project NameOfTheProject node modules react-native-vector-icons Fonts Zocial ttf  to   path of the project NameOfTheProject ios build NameOfTheProject Build Products Debug-iphonesimulator NameOfTheProject app Zocial ttf   2  That command depends on command in Target  NameOfTheProject   project  NameOfTheProject    script phase     CP  Copy Pods Resources     Build system information error  Multiple commands produce   path of the project ios build NameOfTheProject Build Products Debug-iphonesimulator NameOfTheProject app SimpleLineIcons ttf    1  Target  NameOfTheProject   project  NameOfTheProject   has copy command from   path of the project NameOfTheProject node modules react-native-vector-icons Fonts SimpleLineIcons ttf  to   path of the project NameOfTheProject ios build NameOfTheProject Build Products Debug-iphonesimulator NameOfTheProject app SimpleLineIcons ttf   2  That command depends on command in Target  NameOfTheProject   project  NameOfTheProject    script phase     CP  Copy Pods Resources          That response repeat for each  ttf file used by the library   I had to temporary react-native unlink react-native-vector-icons  and the project build again  but with not icons

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I had this problem when I had a file with the same name in two different targets  For some reason one of those files I had part of both targets  So basically I had two files  And both of those files belonged to one target   It makes sense that a target can only have one file name per target  so just unchecking the target member box for the file that wasn t related to the main target fixed the issue

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Search  amp  Remove duplicate files those are produced from multiple commands   Here  an extra Info plist file should be removed  In my case it was Contents json   error  Multiple commands produce   Users uesr Library Developer Xcode DerivedData OptimalLive-fxatvygbofczeyhjsawtebkimvwx Build Products Debug-iphoneos OptimalLive app Info plist

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Steps    Go to Xcode File  Click to WorkSpace Settings Build System Select as Legacy Build System

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In my case  the problem comes from the podfile  I must add my test project to the podfile   target  MyApp  do     pod  Firebase      target  MyAppTests  do         inherit   search paths         pod  Firebase      end end   After that  I need to execute   pod update

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Select your scheme  top left corner  -  Edit Scheme    -  Build  left tab  -  uncheck  Find Implicit Dependencies     And after that you may need to fix any dependencies that were not imported explicitly by your targets

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In my case  I ve got my GoogleService-info plist file multiple copied  as it s included in both my main app and a share extension project   The solution is to exclude this file from the extension project  by unchecking it from the Target in its File Inspector side window view   as I don t like the option to switch to Legacy Build System  which is also working for me

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It s worth noting that this error can be produced after auto generation of CoreData models where the Codegen is not set to Manual None   To correct this in Xcode 10 double click on your xcdatamodeId file and select each of your entities and set Codegen to Manual None under Class in your Data Model Inspector

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The multiple produce error was being triggered by a hidden file for me   gitkeep  Look at your compile sources closely  I believe this file was in Compile Sources but it shows up as an empty row  It doesn t actually say the hidden file s name  but I deleted the blank row and it fixed the issue  so I suspect the project navigator doesn t show hidden files

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Issue  Faced Error on creating xcodebuild archive for Cocoapod Project in the command line  Error in Console  error  Multiple commands produce   Users xxxx Library Developer Xcode DerivedData       Steps that resolved this issue   Open Xcode Select Scheme in the Top of Xcode Editor Select Edit Scheme Select Build in the left column of the Popup window  If any additional Target got added other than the Target related to Edited Scheme  Select the irrelevant Target and remove it by pressing  quot minus icon quot  and close the popup  Run the xcodebuild command again in the command line to get the issue resolved   Description with image  Step 1   Step 3   Step 4-6

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In case you re getting this error with React Native  specifically with libyoga a  check out this Github comment

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My error was      duplicate output file        Users home Library Developer Xcode DerivedData myAppName-fawptgabysjowicvpeqydjniuovo Build Products Debug-iphoneos myAppName app GoogleMaps bundle    on task  PhaseScriptExecution  CP  Copy Pods Resources    Users home Library Developer Xcode DerivedData myAppName-fawptgabysjowicvpeqydjniuovo Build Intermediates noindex myAppName build Debug-iphoneos myAppName build Script-32CCC25BF727B592A1784900 sh   I focused on the problem file being GoogleMaps bundle and the location of that file being in  CP  Copy Pods Resources  and the fact that it specified it   s a duplicate output file  I highlighted them in black above   it s the 4th step below  Make sure you do the following steps on a Duplicate Project  1- In the project navigator I went to the blue project icon    2- I choose Build phases    3- Under Build Phases I choose  CP  Copy Pods Resources    4- Under  CP  Copy Pods Resources I went to Output Files and underneath there I found the file that ended with GoogleMaps bundle  I selected it and pressed the minus sign to delete it  Make sure you go to Output Files and NOT Input Files    5- I did a clean shift cmmd k and afterwards when I built the project the error was gone  The odd thing was even though the red error went away the yellow warning was still there but it worked

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In my case cleaning deprived data and build settings in this order    and restarting Xcode and Simulator helped    I tried to do Solution -  Open target -  Build phases   Copy Bundle Resources   but it appeared there again  Cleaning deprived data helped  in the error it shows where is the duplicate  in my case it said it was in my app bundle and in deprived data

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In our case  we just cleaned up any debris from  Copy Bundle Resources   only leaving the minimum items

[info.plist] Xcode 10 Error: Multiple commands produce

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