Only two communications traces can run concurrently on one communications controller. Only one trace can exist for the same configuration object at the same time.
Although a communications trace can start before or after the configuration object is varied on, if it is important to see the starting information coming across the configuration object, you must start the trace before varying on the configuration object.
Two or more users can select the same trace to format and print. When multiple users attempt to use the same resources (trace data), one user must wait for the other user to finish before beginning to process the data.