Waiting for another flutter command to release the startup lock

Question

When I run my flutter application it show      Waiting for another flutter command to release the startup lock   this messages and not proceed further

User · Answer

If you are using Windows  you can open the task manager and under the  Processes  tab search for processes named  dart   End all those tasks

User · Answer

I just left the terminal open for a minute  then it started working fine again

User · Answer

I have the same issue  I tried all the above solutions  but none of them worked for me  Then I searched the keywords in flutter directory  and found the following code  So I tried to delete bin cache  upgrade lock  and it worked finally

User · Answer

Just type this on android studio terminal and will work again    flutter run

User · Answer

Exit from your IDE  then from start manager stop all dart related files if any have   Then go to  FLUTTER DIRECTORY  bin cache lockfile and delete this lockfile

User · Answer

Delete pubspec lock file Run  flutter pub get  from terminal or editor shortcut   get packages  AndroidStudio or this logo Visual Studio  in pubspec yaml file  Wait for download  If it doesn t work relaunch your editor then repeat step 2

User · Answer

I have tried all of below steps  but none worked   Delete lockfile  Run killall -9 dart  Restart my PC   Below is the final command that worked for me rm -rf  lt flutter dir gt bin cache  upgrade lock

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On Mac remove hidden file   lt FLUTTER HOME gt  bin cache  upgrade lock

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I also faced same issue i followed the best and the easiest way  Environment   Windows  IDE   Android Studio  Tools flutter last option   select flutter clean  after flutter clean finished you all set and good to go

User · Answer

In my case  following command in Terminal helped  as suggested by G  nter    killall -9 dart   On Windows  as suggested by upupming    taskkill  F  IM dart exe

User · Answer

There are some action to do   1- in pubspec yaml press  packages get  or in terminal type   flutter packages get  and wait seconds   if this doesn t work    2-type flutter clean then do step 1   if this doesn t work too    3-type killtask  f  im dart exe  if this doesn t work too    4- close android studio and then restart your pc

User · Answer

It seems like a network issue  I turned off my wi-fi and connected my laptop on a 4G connection by my phone an it works in 5 9s

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You can try to kill all flutter processes  TL DR - go to point 4  1  List of the processes  ps aux  2  Search name containing with flutter  ps aux   grep flutter  where output can be like there  stackoverflow     16697   1 5  0 0  4288316    704       S    10 02PM   0 15 80 bash  flutter path flutter bin flutter --no-color build apk stackoverflow      2800   1 5  0 0  4288316    704       S     9 59PM   0 18 49 bash  flutter path flutter bin flutter --no-color pub get stackoverflow      1215   1 5  0 0  4280124    700       S     9 58PM   0 18 89 bash  flutter path flutter bin flutter --no-color config --machine stackoverflow      8449   1 5  0 0  4296508    716       S    10 00PM   0 17 20 bash  flutter path flutter bin flutter --no-color pub get stackoverflow      1326   1 4  0 0  4288316    708       S     9 58PM   0 18 97 bash  flutter path flutter bin flutter daemon stackoverflow     16687   0 0  0 0  4279100    820       S    10 02PM   0 00 01 bash  flutter path flutter bin flutter --no-color build apk stackoverflow      8431   0 0  0 0  4288316    804       S    10 00PM   0 00 02 bash  flutter path flutter bin flutter --no-color pub get stackoverflow      2784   0 0  0 0  4288316    704       S     9 59PM   0 00 01 bash  flutter path flutter bin flutter --no-color pub get stackoverflow      1305   0 0  0 0  4280124    712       S     9 58PM   0 00 01 bash  flutter path flutter bin flutter daemon stackoverflow      1205   0 0  0 0  4279100    788       S     9 58PM   0 00 01 bash  flutter path flutter bin flutter --no-color config --machine stackoverflow     11416   0 0  0 0  4268176    536 s000  R    10 18PM   0 00 00 grep --color flutter  3  Get processes ID We need content from second column  from above output   ps aux   grep flutter   awk   print  2    4 a  Kill  quot automatically quot   To list  search and kill all of them you can use kill   ps aux   grep flutter   grep -v grep    awk   print  2      you can run it also with sudo  or ps aux   grep flutter   grep -v grep   awk   print  2     xargs kill -15  4 b  Kill manually You can kill processes one-by-one using  sudo kill -15  lt process ID gt   e g  to kill process with id 13245 use  sudo kill -15 13245  If -15 will not work  you can try -2 or -1  Final option it is -9 which should not be used because it prevents the process from doing any cleanup work

User · Answer

try this instead For Window     TASKKILL   F   IM  dart exe   This worked

User · Answer

I use a Mac with Visual Studio Code and this is what worked   Shutdown your PC and switch it on again  Don t use the restart function  I restarted 2 times and it didn t work  Only shutdown worked   PS  I tried out the following    Delete lockfile  Run killall -9 dart  Restart my PC    But they all didn t work

User · Answer

In VS code run   flutter clean   in the terminal  This fixed my issue

User · Answer

In Android Studio  It s Work for me  Stop your app if it still runs on the phone or disconnect the your testing device   Then try to install the package again

User · Answer

1  Stop all running dart instances  If you re using Android Studio save your work and close it  And open your terminal to kill running dart instances   Linux   killall -9 dart   Windows   taskkill  F  IM dart exe   2  Remove lockfile  You can find lockfile inside flutter installation directory    lt flutter folder gt  bin cache lockfile

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For me  the issue s root cause on my Mac device was a version of the flock binary it was not expecting  Removing it from the path did the trick  probably a BSD vs GNU syntax issue

User · Answer

You can remove flutter and  quot install again quot   so fastest way is to  1  Check where you have flutter  as executable  To check it  you can run  which flutter  And you can expect such output   your user your path flutter bin flutter  2  Go to this directory Above path is directly to flutter  but we would like to go to directory so  quot one earlier quot  in path  cd  your user your path flutter bin  3  Check is it git repository It should be  but it s worth to check  Run one of the git command e g  git status  or git branch  When it s git repository you will receive some info about it or correct list of branches  4  Remove all of the files rm -R    5   quot revert quot  removal to have only necessary files  git co --    6  Voila  You can run just flutter version and commands should work  and Flutter will fetch some necessary data

User · Answer

Restart your IDE first and then run the following command in project folder from terminal  killall -9 dart   It worked for me  Hope it will help some of the guys facing the same problem

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This also happens when you have opened the flutter project in the Editor  Close the Editor and re-run the command

User · Answer

Did most of the previous solutions but it didn t work for me so i just left the laptop connected to the internet with VS-code opened  then i switched if off for a while and put it back on and it worked

User · Answer

Turn off Android Studio  Open flutter installation directory  bin cache  Delete lockfile  At this point  you can execute the flutter related command on the command line to solve the problem perfectly

User · Answer

Nothing of ALL these answers didn t helped me   The only one solution was to remove whole flutter stuff  and reinstall flutter from git     lt flutter directory gt   lt user gt   flutter tool state  lt user gt   dart  lt user gt   pub-cache  lt user gt   dartServer  lt user gt   flutter

User · Answer

Most are saying killall -9 dart but nobody mentioned pkill -f dart which worked for me   The difference between the 2 is explained here

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I tried all previous suggestions but without benefit  Finally when I connect my pc to internet and wait flutter to release then 5 minutes solved

User · Answer

For Newbies  The simplest solution  although a little time consuming would be to restart your computer or simple logout from the current user and login again

User · Answer

This occurs when any other flutter command is running in background  To solve this you can run for mac   killall -9 dart  and for windows open task manager  Then in processes tab  search for dart process and kill all of them   Hope this helps you

User · Answer

thanks  Dear all for the right answer  I am using Flutter on Ubuntu killall -9 dart  this command helps resolve this issue for me as well

User · Answer

In Windows    Press  Ctrl   Alt   Delete   In task manager find out your editor such as VS Studio or Android Studio In that Find  dart  and End that Task Then close your editor  Open editor again  let editor to complete all things  after that run your query that will work

User · Answer

Remove this file    lt YOUR FLUTTER FOLDER gt  bin cache lockfile   This releases the occupied lock and makes you able to run other commands

[flutter] Waiting for another flutter command to release the startup lock

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