Possible Uses

A CTRACE filter/analysis (CTRF) exit routine can:

Perform statistical analysis of the CTEs
Provide additional filtering
Limit the number of entries processed

To define a CTRF exit routine to IPCS, the routine must reside in a load library available to IPCS. There are two ways to define a CTRF exit routine to IPCS:

Through the FILTERNAME parameter on the ITTFMTB macro.
Use this method when you are designing CTRACE support and you want to include a CTRF exit routine as part of your design. See Component Trace Exit Routines for further information.
Through the USEREXIT parameter on the CTRACE subcommand in IPCS.
This method is useful for someone doing problem determination who decides that additional filtering (beyond that provided in the original design) is necessary. See z/OS MVS IPCS Commands for information about the CTRACE subcommand.

You can use the PANDEF parameter in a BLSCUSER parmlib member to define an input panel to accompany your CTRF exit routine. The input panel will be available when the CTRACE processing option in the IPCS dialog is used. The user can specify CTRACE options through the input panel. If you want to provide an accompanying help panel for the input panel, specify the help panel within the contents of the input panel.

The naming convention for input panels is to begin all names with COMPOPT. This ISPF variable should be set with the string of options to be collected on the input panel.

References

See the following:

The section on the ANALYSIS option of the IPCS dialog in z/OS MVS IPCS User's Guide for information on the CTRACE processing option.
z/OS ISPF Dialog Tag Language Guide and Reference for information about creating panels.
z/OS MVS Initialization and Tuning Reference for information about using the PANDEF parameter in a BLSCUSER parmlib member.