How to use BAPI in webdynapro through which standard transaction is calling

Hi All,

I'm facing problem in web dynapro application.

When i use BAPI in event on action which in turn calls the standard SAP transaction .

System gives me error "Error when processing your request".

The termination type was: RABAX_STATE.

Please suggest me, The process to call BAPI in web dynapro which returns STD. SAP Transaction.

Regards,

Sheetal