The programmer has a particular job and wants to ignore any abnormal failure message that the job might put out which could cause ESP/Encore to fail/abend it.
Add CONDITIONAL LINK PROCESS as successor which will be released when the JOB fails, it then will force complete the JOB:
CCCHK RC(1:4095) FAIL CONTINUE
JOB MYJOB.COMP LINK PROCESS CONDITIONAL
ESPNOMSG AJ MYJOB COMPLETE APPL($ESPAPPL..$ESPAPGEN)