Event Trace 
All events created correctly are logged in the event trace irrespective of whether potential receivers exist.
If a receiver is entered in the event trace, it does not necessarily mean that this receiver was called successfully.
Prerequisites
The event trace is only written if it has been activated.
If an event is not created, you must first activate the event trace then create the event again to find out why.
Features
The following data is logged in the event trace:
Event data
Triggering object type, triggering object
Event name
Triggering program
Trigger date and time
Receiver or linkage data
Linkage status
Activating/deactivating the event trace
As well as for activating or deactivating the event trace, you can also use this function for specifying selection criteria so that only certain events are logged.
Displaying the event trace
The event trace display can also be restricted using a selection screen. In addition to the criteria for event data, receiver data and event receiver linkage data, the display can also be restricted to linkages with errors.
Deleting the event trace
The deletion of events can also be controlled using selection criteria. The function does not therefore always delete the entire event trace automatically.
If you mark the field Only Display List, the events you select are not deleted, but displayed in a list.
Activities
To activate/deactivate the event trace, choose:
Tools 
Business Workflow Development Administration Event Manager Event Trace Switch Event Trace On/Off 
.Choose Selective Tracing on the dialog box that follows to choose selection criteria.
To display the event trace, choose:
Tools Business Workflow Development Administration Event Manager Event Trace Display Event Trace .To delete the event trace, choose:
Tools Business Workflow Development Administration Event Manager Event Trace Delete Event Trace .