- Entry:
- CFVC
- VIT option:
- CFS
- Event:
- Invocation of the MVS™ macro IXLVECTR
- VIT processing module:
- ISTRACCF
- Control is returned to:
- ISTFSLVC
This trace record is written when VTAM® issues an IXLVECTR macro to modify or test
the list notification vector. 
- Byte (hex)
- Contents
- 00–03
- Record ID: C"CFVC"
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.
- 05
- 0
- 06
- Function codes
- X'01'
- Modify vector size
- X'02'
- Load and test a range of vector entries
- X'03'
- Test a single list state.
- 07
- 0
- 08–0B
- Structure object (CFSSTR) address.
- 0C–0F
- If byte 06 indicates a modify vector size, then this field contains
the new length of the vector.
If byte 06 indicates a load and test function, then this field contains the starting vector index to begin testing. Thirty-two consecutive bits will be tested.
If byte 06 indicates a test function, then this field contains the vector index being tested.
- 10–13
- Address of the invoker of IXLVECTR.
- 14–17
- Return code from the MVS macro IXLVECTR. See the z/OS MVS Programming: Sysplex Services Reference for an explanation of this code.
- 18–1B
- If byte 06 indicates a modify vector size function, then this
field contains the actual length of the new vector. If byte 06 indicates a load and test function, then this field contains a 32-bit string where each bit indicates the following information:
- 0
- List is not empty
- 1
- List is empty
- 1C–1F
- Request parameter header (RPH) address.