Waiting for another flutter command to release the startup lock

When I run my flutter application it show

> Waiting for another flutter command to release the startup lock

this messages and not proceed further.

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

Remove this file:

<YOUR FLUTTER FOLDER>/bin/cache/lockfile

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

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

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.

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

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.

In Windows :<br/>

Press: <kbd>Ctrl</kbd> + <kbd>Alt</kbd> + <kbd>Delete</kbd>

- 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

**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.

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.