What is the CA Mainframe Application Tuner CICS Transaction TUNC? How does it get allocated?
The job TNCSDUP$ found in the UTRSAMP dataset creates all the CSD entries required by CA Mainframe Application Tuner (MAT).
The member will have no reference to TUNC, only TUNS. TUNC is dynamically defined by CA MAT and does not need to be defined with the TNCSDUP$ job. After running the job there should be a group CAMATA0 installed. The last two statements in CEESSAMP(TNCSDC$) is to add the group to a list that is specified in the CICS SYSIN GRPLIST. Make sure that you update this to a GRPLIST that is specified at startup. If not, you can always manually install the group through CEDA.
For more information on the TUNC transaction, see CICS Summary Statistics.