JES000045E Jnnnnnnn - Failed to retrieve JESYSMSG record for job <Original Job Number> specified in restart parameter.

The job could not be started as a restart of the original job number because the JESYSMSG record for that job could not be found in the spool DSN file. If the original job is not listed in the spool completed jobs view in ESCWA then a new job cannot be submitted as a restart of it.