Android Studio TransformException : Error:Execution failed for task ':app:transformClassesWithDexForDebug'

Question

I am getting the exception below when I am trying to run the application using Android Studio:

Error:Execution failed for task \':app:transformClasses

Answer 1

in my case using android studio 2.0 preview 4 I suddenly got that problem and adding multiDexEnabled true didn't help, and also clean and rebuilt didn't help.

so the only thing that solved it for me is deleting that file:

YOUR_APP_NAME\app\build\intermediates

and run the application and it works.