Flutter app not running showing only "Waiting for another flutter command to release the startup lock"

Question

When I hit run button for Flutter app then IDE Intellij IDEA shows a message on console "Waiting for another flutter command to release the startup lock..."

Nothing happens after message.

Solution 1

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

killall -9 dart

On Windows (as suggested by upupming):

taskkill /F /IM dart.exe

or remove this file

<YOUR FLUTTER FOLDER>/bin/cache/lockfile

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

Solution 2

Stop any instance of flutter IDE's ([IntelliJ]/[Android Studio]/[VS Code]) and check for the existence of a file named lockfile in location [flutter_installation_folder]/bin/cache/. If any, delete it and restart your favorite IDE.

Comments

[F-1]

What version of Flutter are you using? Have you tried turning it off and on again?

[ibhavikmakwana]

which IDE you are using

[ibhavikmakwana]

Try killing terminal

[ibhavikmakwana]

if it not solves try Kill all dart processes and try again or restart the computer.

[Code Hunter]

@F-1 I am using Flutter 0.7.3

[lena]

Do you have flutter packages pub build_runner watch running? Can be github.com/flutter/flutter/issues/14703