They were running a BMC product call ARC -Control. Any job under ARC-Control generates an entry in the ACBMACRF paramater of NCFX, and they want to shut this off so jobs under ARC do not run longer.
I see the following messages in the dump's MTRACE: . 03:31:05.21 STC05637 ARC 0722I BACKUP STARTING ON VOLUME STG009(NONSMS) AT ARC0722I (CONT.) 03:31:05 ON 2007/02/02 SYSTEM FBPA