Solution : https://service.sap.com/sap/support/notes/358813 (SAP Service marketplace login required)
Key words :
additional key words rddimpdp rddnewpp batch subst_start_batchjob, importing additional support packages, change job class 'a', complete support package functions, job class 'a', execute report rddnewpp, executing report rddnewpp, changed report rddnewpp, job class 'c', spam/saint version 0024
Related Notes :
1459979 | SPAM/SAINT: Priority of import job OCS_QUEUE_IMPORT |
50104 | Job class of background jobs during the import |