APPC Subsystem on MPE/XL Node Manager's Guide (30294-90007)

Chapter 2 55
Interactive Control Operator Commands
APPCCONTROL TRACEON
When the APPC subsystem is activated, internal tracing is disabled by
default. It can be enabled at startup by specifying TRACEON = YES in
the APPCCONTROL START command. See the description of APPCCONTROL
START, earlier in this chapter.
If you start up the APPC subsystem programmatically, you can enable
internal tracing by setting the
TraceOn parameter of the APPCStart
intrinsic to 1. See Chapter 3 , “Control Operator Intrinsics,” for more
information on control operator intrinsics.