Well after a lot of digging I found some abend details in the IDMS.PR00.SYSTEM.DDLDCLOG – this is actually an AREA, not a flat file -- SYSTEM.DDLDCLOG.
This LOG is for ADSO program logging – shows errors/Aborts (ABRT), etc. This is NOT a transaction log for rollback/recovery.
I was able to report on this Log using PGM=IDMSBCF with this command:
PRINT LOG FROM DATABASE MESSAGES STATISTICS TRACES DUMPS
START AT '2017-05-11-08.00.00' STOP AT '2017-05-11-14.10.00.999999';
Since this is an area in the SYSTEM Dictionary, I thinkk I should be able to look at it through DMLO but I can't figure out what the subschema is.