The VP390 messages file, identified by the MSGCATLG DD card in the VP390 startup JCL, contained more lines than expected for a valid messages file.
The VP390 task terminates.
Verify that the MSGCATLG file does not contain extra non-blank lines which could be misinterpreted for message lines. Comment lines beginning with an asterisk and blank lines in the file are ignored. Restart the VP390 job.