Debug Attach Server

The error messages described here can occur during attached debugging in a z/OS environment.

For error analyses, you can also check the output of the TRACE option set with the DBGAT profile parameter (see the Parameter Reference documentation).

Code Module Explanation
NAT1999 NATATDBG

Module for CICS loaded in a non-CICS environment. Ret 12.
RCALIAS=(NATATDBG,NCIADvrs) was used in a non-CICS environment.

Or:

Wrong module loaded in CICS environment. Ret 12.
RCALIAS=(NATATDBG,NCIADvrs) was not used in a CICS environment.

Or:

Physical connection failed. Ret 12.

There is either no TCP transport layer available or the TCP/IP listener is missing on the host and port provided in the DBGAT parameter.

Or:

Logical connection failed. Ret 12.
The listener on the host and port provided in the DBGAT parameter is not an attach debug server.