DALDIAGN requests the OPEN/CLOSE/EOV trace option, which gives a module-by-module trace of OPEN/CLOSE/EOV's work area and the user's DCB. When you code DALDIAGN, # must be zero; LEN and PARM are not specified. GTF must be active in the system while the job that requested the trace is running.
KEY # LEN PARM
0054 0000 - -