U0051 return codes are internal logic errors that can be detected when attempting to use one of the CA MIM Virtual Control File (VCF) communication methods (CTCONLY, CTCDASD, or XCF). This section provides a list of the return codes, and a brief explanation of each code.
Internal entry to recovery
CONTROL FILE ERROR
INVALID REQUEST IN MAINPOST
REQUEST FOR UN-ALLOCATED BUFFER
REQUEST TO FREE UN-ALLOCATED BUFFER
XFER BUFFER NOT IN VIRTUAL CF
UNEXPECTED CONTINUATION OF XFER
RESERVE NOT HELD WHEN EXPECTED
NO USABLE PATHS
INVALID REQUEST GIVEN TO SENDREQ
INVALID DESTINATION IN SENDREQ
XFER SEQUENCING - 1ST BUFFER
INVALID MODIFIER IN SENDREQ RECEIVE
NOT MARKED AS FIRST
DEBLOCKING ERROR
NO VCFIOSB AVAILABLE
RESERVE REQUEST - ALREADY OWNS
INTENTIONAL MIGRATION TO DASD
VCF SUBTASK TERMINATED
INVALID MODIFIER IN VCFIOSB
UNEXPECTED OPCODE
DIRECTED TO SWITCH TO UNKNOWN CF
DUPLICATE POST DETECTED
NO SAVE AREA AVAILABLE TO POST RTN
NAK RESPONSE RECEIVED
I/O ALREADY ACTIVE ON PATH (VM ONLY)
FINDPATH FOUND INVALID VCFPATH
INVALID/INACTIVE MASTER SELECTD
NO MASTER SYSTEM AVAILABLE
DROP TO DASD DUE TO VCF ERRORS
RECURSION IN RECOVERY PROCESS
ERROR ON CHECKPOINT FILE
HANDSHAKE(S) COULD NOT BE SENT
NO VCFIOBUF AVAILABLE
NO GMR BUFFER FOR XFERMAST
VCFIOSB bad - failed validation
VCFRQHD bad - failed validation
Duplicate masters detected
STARTIO failed
Invalid CCW opcode lookup value
CTC PURGE failed validation
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