EVS901 RKEIEDS SHOWCB ERROR - EPILOG/IMS IS TERMINATING

Explanation
An error occurred during OPEN processing of the EPILOG data store. 

System action
The EPILOG write subtask terminates. A U0303 abend accompanies this message, because the dump from the U0303 abend is needed to determine the SHOWCB feedback code. 

User response
Call IBM Software Support.   