HFZTRACE under CICS

PF11 from the CFA transaction can be used to turn the Z Abend Investigator debugging trace,HFZTRACE, ON or OFF. The trace is written to the HFZTRACE DDname, dynamically allocated to the JES spool. For example, entering '?' against a CICS® region under SDSF, might result in the following display with the HFZTRACE output selectable with 'S' at ❶:
Figure 1. Sample CICS region SDSF Job Data Set display
  Display  Filter  View  Print  Options  Help
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SDSF JOB DATA SET DISPLAY - JOB AS650F1  (JOB31639)     DISPLAY RESET
COMMAND INPUT ===>                                            SCROLL ===> CSR
PREFIX=*  DEST=(ALL)  OWNER=SOMEONE  SYSNAME=
NP   DDNAME   StepName ProcStep DSID Owner    C Dest               Rec-Cnt Page
     JESMSGLG JES2                 2 SOMEONE  X                          4
     JESJCL   JES2                 3 SOMEONE  X                        259
     JESYSMSG JES2                 4 SOMEONE  X                      2,173
     SYSPRINT AS650F1  AS650F1   103 SOMEONE  X                        126
     MSGUSR   AS650F1  AS650F1   105 SOMEONE  X                      2,328
     PLIMSG   AS650F1  AS650F1   106 SOMEONE  X                          0
     DFHCXRF  AS650F1  AS650F1   107 SOMEONE  X                        641
     COUT     AS650F1  AS650F1   108 SOMEONE  X                          0
     CEEMSG   AS650F1  AS650F1   109 SOMEONE  X                          0
     CEEOUT   AS650F1  AS650F1   110 SOMEONE  X                          0
     PRINTER  AS650F1  AS650F1   116 SOMEONE  X                          0
❶  HFZTRACE AS650F1  AS650F1   117 SOMEONE  X                        172
     CRPO     AS650F1  AS650F1   119 SOMEONE  X                          0