Hi Prakash,
I know that its too late to answer..! 
But may be someone will find it useful. I found this error in sourcing "Carry out" sourcing. When checked in ST22, I found that the error occured as the visible rowcount was 500 which is out of limit ( 0 to 100, something like this). I then launched the webdynpro application "WDA_ANALYZE_CONFIGUSER" from SE80. This webdynpro application contains personalized entries specific to error. I found the visible row-count set to 500 thereby violating the assertion condition. I deleted the entries from the same application for user and it worked.
PS: SAP SRM, EHP2, UI- Webdynpro
BR,
Harry