033 Error in SLB (System Level Backup) API call.

Explanation
A call to the SLB API ended in error. 

System programmer response
Acquire and SVC dump of the abending address space, whether it is the IMS Database Recovery
master address space (MAS) or the recovery sort subordinate (RSS) address space.

Module
FRXICTL0, FRXIRTH0, FRXVSTA0