Visual Studio popup the operation could not be completed

Question

When I try to open a project  local or on a Team Foundation Server  TFS   I get a modal window telling me that      The operation could not be completed  Unspecified error   Or the same message  but with  Class not defined    instead of  Unspecified error    These errors started happening earlier today when I tried to check in some of my work to the team foundation server  I have tried using Visual nbsp Studio nbsp 2008 on the same computer  but I still get the same error  I ve also googled for it but none of the solutions seems to help me   I have installed the latest updates from Windows Update as well   Any ideas

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Run eventvwr from the command line to see if it has recorded any Application errors   This might give you an actual error message that is more useful

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Restarting Visual Studio solved my problem

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VS 2015 -  Deleting all the files in the ComponentModelCache worked for me   C  Users   username   AppData Local Microsoft VisualStudio 14 0 ComponentModelCache

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I had a similar problem on opening Razor Views   I logged on to my Azure account which was asking to re-enter my credntials  Restart VS 2015 Update 1

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If you are using Visual studio 2015 and working on ASP NET  create a new website  copy the previous files into the new site and build your site  Your old project is still referencing some old startup parameters

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Sometimes it is just a matter of closing Visual Studio 2015 and then open again     Update   Visual Studio 2017 apparently as well   I have had this happen on a few machines     This does happen       Have you tried to delete the  Your Solution FileName suo  file      Also computer crashing like e g  power outage etc       Applies to Update 2 and Update 3 as well as fresh base without any updates

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For Visual C   projects  this can be caused by an improperly formatted vcsproj filters file   In my case  someone had performed a manual branch merge and didn t merge the filters file correctly  Visual Studio still loaded and built the file without any warnings  but would give the  unspecified error  warning whenever trying to add or remove files from the project   Scan your vcsproj filters file for any duplicate entries or lines that look like this and remove them  Close and reopen the project    lt ClInclude Include        path to sourcefile h    gt    Visual Studio Enterprise 2017

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The error can also happen if you re in the folder in Windows Explorer or another app as you try to delete it from VS or have the file opened in another app  Windows has the habit of locking folders and files  especially on networked machines  It is possible to break the lock by using Process Explorer occasionally  but the simplest thing to do is to get out of the folder or close the file in question

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For this problem  I resolved it by deleting the  user file which contains the Visual Studio Project User Options  This File can be found in the same place where your  sln file is located  Also  after deleting this file from the project make sure to reload your solution in order for it to take effect

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In our  the problem appeared after making changes in Debug -  myProject Properties -  Web  specifically changing the project URL and then closing VS  Upon reopening  VS had trouble parsing the new URL and so threw the error  Unfortunately  further configuration through the VS UI was not possible since the project won t load    Since the file configuration changes are persisted in the myProject csproj user file  which lives in the project s root folder  the problem was easy to correct by simply removing the myProject csproj user file  At that point the project would load and the user file was then regenerated when the project was next run in debug mode    Note  the project URL in the regenerated file had to be changed from the default http   localhost 58995 to the original https   localhost 44302 before the entire application could be accessed since we have the app locked down under SSL  Your ports may be different  This was done through VS under Debug -  myProject Properties -  Web after running the project

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In my case   Silverlight 5 SDK  was missing and so my silverlight projects are not getting loaded  While trying to reload project it shows    the operation could not be completed    message  Once i installed  problem is solved

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I removed an old project from the solution  after that the error occurred   I had to open the  sln file in notepad and delete the  dll reference tot he old project that I removed   After that it worked

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I had same error  I couldn t open any class and component of my solution  I deleted the ComponentModelCache and tested any other solutions   but no result  Finally it helped me  Just CLOSE YOUR VISUAL STUDIO AND AGAIN OPEN IT

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Have you tried to delete the Your Solution FileName suo file     The  suo file should be in the same folder as your  sln file  or in the  vs folder for newer versions of Visual Studio  The  vs folder might be hidden     Update for Visual Studio 2017 In VS 2017 the  suo files are located in a different folder  you can find the  suo file in YourSolutionFolder  vs YourSolutionName v15  suo    The  vs folder is hidden  and the  suo files is a file without name  with just the  suo extension          Explanation  The  suo file contain various information like the opened files list  and some preferences that are not saved in the solution file  like the starting project  and other things   Normally you can delete the  suo file without problems  You might have to set the StartUp Project for your solution afterwards   Just to stay on the safe way  you can rename the  suo file  and then retry to start the solution  to see if this help   In my experience sometime VS crash on start because there is an error in some source code  and due to that error VS can t compile the code  and then crash because without compiled code it s unable to show form in design mode  In this case  deleting the  suo file will solve the situation because it reset the open files list  so the solution can start up without opening showing any files     When deleting the  suo file doesn t works Here s a list of other things you can try when deleting the  suo file doesn t resolve the issue    Restart the computer Clean Windows temp folder Clean the solution from the IDE  Menu Build Clean Solution  Clean the solution manually  delete the compiled DLL EXE in the  bin  folder and empty the temporary files that VS create during the build process in the  obj  folder  each project that compose the solution has these folders  so clean them all   Try to open each single project that compose the solution 1-by-1 and build it  to understand which is the specific project that generate the issue Understand what is the change edit modification that triggered the error  and undo it  source control tool can help     If you have custom controls  check the code in the constructor  The VS IDE will call the constructor of your custom controls even at design time  and weird things can happen  at design time some properties dont works  your connection string probably isn t populated       As a last resort        Try to install any VS update Try to disable VS extensions  if you installed any     Try to update any external DLL Control referenced in your solution Try to update Windows

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For me it was because I d added an entry to bind the site in IISExpress to a specific IP address  and my IP address had changed  I got a clue from the event log   Hope this helps someone

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Make sure your Output Window is visible before hitting the F5 button   If you have your Output Window maximized  occasionally Visual Studio does not re-open the Output Window when you restart it   Simple fix   1  Restart Visual Studio 2  BEFORE building a project  use View- Output Window  Now when you build  it should work    I m pretty sure deleting  suo and  user files only works because it resets Visual Studio to its default layout  which ensures the Output Window is visible

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I think StyleCop is the reason of the this issue  So     Close VS  I removed all StyleCop Settings and StyleCop Cache files in all solution projects  I removed also all projects   csproj user file  Restart VS

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I was upgrading to  NET4 6 from a 3rd party app  unity3d   I would get this message when I tried to reload the solution when it wouldn t load on startup  My solution was right clicking the solution and selecting  install missing features  which prompted me to download what I needed  The download on the popup didn t work so I just installed the  NET targeting pack for what I was on  4 6  and this fixed it

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I ran into this same problem but deleting the  suo file did not help  The only way I could get the project to load was by deleting the  Your Project FileName csproj user  file   --  I ran into this problem again a few months later but this time deleting the  Your Project FileName csproj user  file didn t help like it did last time  I finally managed to track it down to an IIS Express issue  I removed the site from my applicationhost config and let Visual Studio recreate it  this allowed the project to finally be loaded

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Worked for me after I closed Visual Studio  2015 Community Edition   opened it and opened project again Had Happened to me because I was using this project as a dependency in another project and it was opened in another instance but the changes were not imitated

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Go to Run and type  inetmgr   i e IIS is opened and in the right corner Action window  select option change   NET Framework version   Change it    After that  reinstall your Visual studio 2010  It works on my computer  and that s why sharing

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For me  this issue was being caused by conflicting  lt site gt  configurations in the following file   C  Users smunro Documents IISExpress config applicationhost config   I edited this file to remove all of the site elements within the following element  You might want to be a little more selective and try to identify the site that is causing the conflict and remove just that    lt configuration gt  lt system applicationHost gt  lt sites gt    Note that I left the  lt siteDefaults gt    lt applicationDefaults gt  and  lt virtualDirectoryDefaults gt  elements there   When I reloaded the project  a new  lt site gt  element was created automatically

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No more  SUO files  but deleting  user files works  FYI  I am debugging Silverlight project

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I had to remove a webproject  There was an old referencing DLL file inside  and I had to clean that webproject  and then it worked

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Restart the visual studio as Admin will work on in many cases

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While working on VB Net projects in Visual Studio 2005  I have faced this issue many times  Usually  disabling the  Enable the Visual Studio hosting process  option in the application s debug properties solves the issue for me  Usually  when the hosting process is enabled  calls to certain APIs can be affected   To un-check this option  you need to follow the steps below    Right click on your project in the Solution Explorer Select properties Under Debug tab  you would find a check box option for Enable the Visual Studio hosting process  Un-check this option  Save your changes

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The operation could not be completed  error can also be caused by a C   project referencing another project that no longer exists in the solution   Normally  when you remove a project from a solution  Visual Studio removes any references to it from other projects in the solution   In my case  however  I was sharing projects between solutions hence a bad project reference managed to sneak in  and deleting the bad references fixed the error   Using Visual Studio 2012

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I deleted all  suo and  user files and restarted VS 2008  But it didn t worked for me  The following steps worked for me   Open project file   csproj  in notepad  Removed all configurations from  lt Configurations gt  lt  COnfigurations gt  tag  Then add one by one configuration and reload project in VS  Build the project or view project properties

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Solution  I was getting this dialogue when trying to build rebuild clean my  sln  To fix it I needed to stop the IIS site bound to the application and restart visual studio   Then start your site again    How I discovered the cause  Seems this is a pretty generic message for a wide range of issues  I ended up tracking down my particular issue to a few locked files by IIS with the event logs   The solutions for deleting all sites are kind of a  Nuke it from orbit  approach which should be used as a last resort

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I had similar problem in iOS project in vs 2019 it s running on VM in Mac  I close and restart the visual studio  the issue was gone

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None of the solution above worked for me  But following did     Open the current folder in Windows Explorer Move the folder manually to the desired location Open  csproj file  VS will then automatically create the  sln file

[.net] Visual Studio popup: "the operation could not be completed"

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