#UBS043W & #UBS054W: APPROACHING MAXIMUM NUMBER OF JOB ID KEYS

The "#UBS043W:  APPROACHING MAXIMUM NUMBER OF JOB-STEP-ACR KEYS" and the "#UBS054W: APPROACHING MAXIMUM NUMBER OF JOB ID KEYS" messages mean that your History Database is approaching the maximum number of JOB IDs it can hold. In order to prevent the History DB from reaching the maximum number of JOB IDs, you can REORG the database or copy the database into a larger one.

#UBS043W means your primary History Database is the one outputting the error. if you have Dual History enabled and your secondary History Database is the one approaching the max number of JOB IDs, then #UBS054W will be the error code instead.