IBM RT PC Problem Determination Manual page 247

S tep 1. S ta r tin g th e T race
S tep 2. S top pin g th e T race
After the setup of the trace profile has been completed, you can
start the trace.
1. Type the command:
trace&
2. Press ENTER.
The trace is on, now run the program you want to trace.
Once you have traced the information,
1. Type the following command to stop the trace:
trcstop
2. Press ENTER.
Section 4. The Trace Utility 4-5