The com.arbortext.e3c.E3Tracer interface provides a way for the Client Composer and Client Composition Extensions to write information and error messages to an output log for debugging purposes. Messages passed to the interface’s info method are discarded unless the Client Composer is configured to write them.

Messages sent to the tracer are written to the Application Save log and to the Arbortext Diagnostics window (launch it from the shortcut called Arbortext Publishing Engine Diagnostics in your PTC program group) when the Client Composer runs on Windows.