This optional variable allows the administrator to get traces for the system activities.

It can be set from 0 to 9, 0 represents no trace, 9 represents maximum trace. The default value is 0 when the variable is not defined. The most relevant trace levels are:

• 0 – servers startup and fatal errors information
• 1 – transaction / command audit information
• 2 – loading resources and advertising services information
• 3 – informations exchanged with the terminal
• 5 – SPOOL (CICS SPOOL) function traces
• 7 – CICS function traces (KIX__)
• 9 – traces for support team

Other levels are reserved for support team. The higher level covers all traces delivered by lower level.