CSUB Abend information

If a CICS-Db2® subtask abends, as part of the recovery process, CICS® saves information from the MVS SDWA in the CSUB control block.

For example, the CSB_SDWA_REGS (regs 0 -15) and the CSB_SDWA_PSW fields. The CSB_SDWA_REGS is the 16 words following the SDWA eye catcher. The CSB_SDWA_PSW field is the two words following the CSB_SDWA_REGS field. Although the CSUB is typically cleared by the FREEMAIN function following the failure, the exception trace written at the time of failure, AP 319D, captures the CSUB control block containing the SDWA information.