BAM diagnostic aids

The following major diagnostic aids are provided for the basic access method (BAM):

Extended format I/O routine diagnostic information
The format of the interrupt control block (ICB) that is used for chained scheduling (Tape and unit record).
A procedure for retrieving additional information in SYNAD routine (DASD). For tracing of access method code that is called during OPEN, CLOSE, and EOV, see Using error records for debugging
For fields that BAM adds to the IOB, see IOB.

If a message or abend code is related to the failure, refer also to: