Tracing of installation-provided applications

The CTncccxx parmlib member is specified in the PARM parameter of the CTRACE macro in the application. See z/OS MVS Programming: Authorized Assembler Services Reference ALE-DYN for information about the CTRACE macro.

The CTncccxx member specified on the CTRACE macro allows an application to establish component tracing options at initialization. A CTncccxx member can specify options for only one trace; if an application has multiple, concurrent traces, called sublevel traces, a CTncccxx member must be specified for each sublevel trace.

Tracing options specified in the CTncccxx parmlib member identified by the CTRACE macro can be overridden by a CTncccxx parmlib member identified on a TRACE CT command. You can use the PARM parameter on a TRACE CT command:

To specify a CTncccxx member that contains the desired options. This trace will begin immediately.
To specify a CTncccxx member that contains a PRESET parameter to turn on the trace later when the CTRACE macro is invoked.