KS3A503E UNABLE TO OBTAIN STORAGE FOR DSCB BUFFERS ON VOLUME [volser]
Explanation
The collection task was unable to obtain storage for a required control block.
System action
Collection for the indicated volume terminates. Other collection tasks continue.
User response
This error might occur because of the aggregate storage requirements in the address space at the time collection started. The problem might not recur on the next collection cycle. Examine other messages in the ITMS:Engine log, RKLVLOG, to determine the cause of the error and contact IBM® Software Support.