If the BMC product STOPX37 is in use, to avoid the generation of duplicate dataset errors, and there are still View Sysout Selection List XCODE fields showing JCLERR, you can suppress the JCLERR values by modifying the SARSTCUX and SARXCTUX exits by using the CVDEOPTN SARSTCUA source and SARXCTU3 source (respectively), for the exits.