034 Error in HPIO API call when HPIO(WRITE(Y) was specified.

Explanation
A call to the HPIO API ended in error. 

System programmer response
Acquire an SVC dump of the IMS Database Recovery
Facility recovery sort subordinate (RSS) address space, and contact IBM® Software Support for further assistance. 

Module
FRXSDR00, FRXIOCN0, FRXIVCN0