Pick Selection List Generation request has been completing with error.

Hi ,

Facing the error

"Pick Selection List Generation" request has been completing with error .

Log is as below.

Start of log messages from FND_FILE
+---------------------------------------------------------------------------+
p_log_level is 0
Error occurred in WSH_PICK_LIST.Create_Move_Order_Lines
SQLCODE: 1 SQLERRM: User-Defined Exception
Exception occurred in WSH_PICK_LIST.Release_Batch_Sub
Error occurred in Release_Batch_Sub
SQLCODE: 1 SQLERRM: User-Defined Exception
Exception occurred in WSH_PICK_LIST
+---------------------------------------------------------------------------+
End of log messages from FND_FILE
+---------------------------------------------------------------------------+

Please can some one help..

Thanks in Advance.