You can specify whether the trace information is removed from the system or left on the system after the information is displayed.
You can do this using the Display Trace Data (DSPTRCDTA) command. If you leave the trace information on the system, any other traces are added to it. The information remains on the system (unless removed) until the debug job ends or the ENDDBG command is submitted. You can also use the Clear Trace Data (CLRTRCDTA) command to remove trace information from the system.