The generalized trace facility (GTF) could not trace the data associated with the current channel command word (CCW). This is because GTF could not translate the real address of the data to a virtual address or translate the virtual address back to a real address.
GTF issues this message to the GTF output data set as a trace record.
GTF writes the input/output supervisor block (IOSB) to the GTF output data set. If an error recovery program (ERP) workarea is present, GTF writes the ERP work area to the GTF output data set. GTF continues processing.
This message occur frequently while GTF traces the I/O activity of a paging data set. If this message occurs frequently for I/O that is not paging I/O, check logrec data set for GTF errors.
Generalized trace facility (GTF)
AHLTCCWG