AHL151I
THE ADDRESS OF THE CCW IS NOT VALID. THERE IS A BREAK IN THE CCW CHAIN.

Explanation

The generalized trace facility (GTF) attempted to trace a channel command word (CCW). One of the following is true about the real address of the CCW:
  • GTF could not translate the real address into a valid virtual address.
  • GTF translated the real address into a virtual address but then could not translate the virtual address back to the same real address.
  • The boundary of the storage location containing the real address is not a double word boundary.

System action

GTF issues this message to the GTF output data set as a trace record.

GTF places 8 bytes (a double word) of zeroes in the slot reserved for the CCW. GTF places the incorrect real address in the field that normally contains the CCW address. GTF writes the I/O supervisor block (IOSB) to the GTF output data set. If an error recovery program (ERP) is present, GTF writes the ERP to the GTF output data set. GTF continues processing.

System programmer response

Obtain the SYSOUT output for the job. Search problem reporting data bases for a fix for the problem. If no fix exists, contact the IBM® Support Center.

Source

Generalized trace facility (GTF)

Module

AHLTCCWG

Parent topic: AHL messages