Caused by: java.lang.AssertionError: Could not delete caches dir yourProject\build\kotlin\compileDebugTestingKotlin

Question

Sometimes this unexpected message appear and the only way to deal with this is to restart the pc and when it starts again go to the obove path and delete the file before start Android Studio with the project. It works for some time but latter appears again. Maybe someone of you know how deal better with this annoying issue.

CreateProcess error=206, El nombre del archivo o la extensión es demasiado largo
Caused by: java.lang.AssertionError: Could not delete caches dir YourProjectPath\build\kotlin\compileDebugTestingKotlin

Answer 1

In windows open task manager.

• Go to details tab.
• Look for Java.exe.
• End Task for all instances of Java.exe.

This works perfectly for me.

Answer 2

Notice: This happens with the newer AndroidStudio 4.2.x.

Temporary solution:

Delete (the contents of) the folder which is giving you the issue. For example:

..\app\build\kotlin\compileDebugKotlin\caches-jvm\inputs

If you get: "The file is open in OpenJDK Platform Binary" you'll need to stop these processes through Windows Task Manager > Details > Java.exe.

Please know that with this method the error will repeat again after several assembly attempts.

UPDATE:

Google hasn't provide us a fix, so you'll need to downgrade to an older version which works for you. 4.1.3 seems to be working fine.