Diagnosis
You are attempting to switch on one or more traces. However, one ormore of the traces has already been switched on for one user or for allusers.
The trace can only be switched on for one user or for all users. Youcannot change the trace switch currently.

System Response
The system continues processing after displaying the message.

Procedure
Wait until the user has switched off the trace.
If necessary, contact the user who switched on the trace. You can findthe name of the user on the "Trace requests" screen (initial screen oftransaction) under "State of trace".