THE ADDRESS OF THE CHANNEL PROGRAM IS NOT VALID. THE CHANNEL
PROGRAM CANNOT BE TRACED.
Explanation
During tracing of a channel program, GTF encountered
one of the following problems with the real address of the beginning
of the channel program:
- The generalized trace facility (GTF) could not translate the real
address into a valid virtual address.
- GTF translated the real address into a virtual address but could
not translate the virtual address back to the same real address.
- The real address is not the address of a double word boundary.
- On an end-of-sense-information interrupt, the channel command
word (CCW) address (the real address), for non-zHPF
channel programs, or the transport control word (TCW) address, for
zHPF channel programs, in the subchannel status word (SCSW) is zero.
You can find the real address of the beginning of the
channel program either in the operation request
block (ORB), the program controlled interrupt (PCI) table, the SCSW, or
the I/O supervisor block (IOSB).
System action
GTF issues this message to the GTF trace data
set as a GTF trace record. GTF writes the contents of the IOSB to
the GTF trace data set. If an error recovery program (ERP) work area
is present, the system writes the ERP work area to the GTF trace data
set. GTF continues processing.
System programmer response
If the condition persists:
- Examine the start subchannel (SSCH) record associated
with the missing CCW or TCW chain for an incorrect CCW or TCW.
- Examine the IOSB that GTF wrote to the GTF trace data set.
- Examine the logrec data set for errors in GTF modules.
Source
Generalized trace facility (GTF)
Module