- Entry:
- CPWT
- VIT option:
- SSCP
- Event:
- CPWAIT macro (Part 1)
- VIT processing module:
- ISTRACSC
- Control is returned to:
- ISTCPCPW
This trace record gives information about CPWAIT macroinstruction processing. It may help you determine why I/O is outstanding or why an SSCP request is failing.
This entry is eventually followed by a CPPT entry (to
resume processing) or a CPPG entry (to purge the waiting task). Use
the EID field to match corresponding entries. 
- Byte (hex)
- Contents
- 00–03
- Record ID: C"CPWT"
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.
- 05
- 0
- 06
- Type flags
- B'00000001'=PVI event
- B'00000000'=non-PVI event
- 07
- 0
- 08–0B
- LQAB address for this CPWAIT macro
- 0C–0F
- Data field in ISTWRE when CPWAIT is performed
- 10–13
- Work element address
- 14–17
- CPCB operation code that indicates the original request for this work element or 0 (See z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures.)
- 18–1B
- For PVI event, caller's save area ID or 0. For non-PVI event, save area ID
- 1C–1F
- Sense code or 0