R.java error .. gen folder file is not generating in WORKLIGHT android environment : R.java error .. gen folder file is not generating in WORKLIGHT android environment.

I tried clean and build.
Android target version and everything goes fine.
Recreated the project.
Restarted eclipse .
But, still its in R.java error.

How to solve it.. please give me an answer.

I am using UBUNTU, IBM Mobile first platform.