Trace event '%1' is referenced by one or more sessions. Drop referencing sessions first

Error constant SQLE_TRACE_EVENT_IS_IN_USE
ODBC 2 state ERROR
ODBC 3 state ERROR
Parameter 1 The trace event name.
Severity 11
SQLCODE -1636
SQLSTATE WE022
Sybase error code 12476
 Probable cause
 More information