msg Message ID to be written
VP390 attempted to issue a message with the message ID msg but could not find this message ID in the MSGCATLG file.
Verify that the file identified by the MSGCATLG DD in the VP390 startup JCL contains message text for the ID msg. In the MSGCATLG file, message IDs must start in the first column of each line. Restart the VP390 job to re-read the messages file.