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.

Answer 1

In my case, following command in Terminal helped (as suggested by Günter):

killall -9 dart

On Windows (as suggested by upupming):

taskkill /F /IM dart.exe

Answer 2

Remove this file:

<YOUR FLUTTER FOLDER>/bin/cache/lockfile

This releases the occupied lock and makes you able to run other commands.

Answer 3

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

Answer 4

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:

1. Delete lockfile;
2. Run killall -9 dart;
3. Restart my PC.

But they all didn't work.

Answer 5

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

Answer 6

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

Answer 7

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

Answer 8

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.

Answer 9

For Ubuntu Linux

killall -9 dart

This worked for me even when IDE was on