Android Studio-Java.exe is finished with non-zero exit value 2

Question

When I try to Run my app, I am getting this error:-

Error:Execution failed for task \':app:dexDebug\'.
> com.android.ide.common.process.ProcessException:          


        

Answer 1

I got this error when I used the beta version of gradle to test Vector Asset. This error perssisted even after I switched back to stable Gradle version 1.3.0.
The error was fixed after I used Build > Clean project