EVS905 RKEIEDS GENCB 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.  

User response
See the Configuration and Customization Guide, for region size needed. If the region size is sufficient and the problem persists, call IBM Software Support.   