How to Trace a BAPI ?

Hello Experts from SAP,

My developer is is unclear why his BAPI sometimes does not seem to work.

This BAPI is called via RFC from external application.

When called in R/3, I managed to trace the RFC call but its very difficult to understand the trace file.

And I cannot find the BAPI name in the file. The aim is to know what is wrong with the BAPI or at which stage is the BAPI not processing properly or in a time-out situation such that the program never ends.

Does anyone here know how to trace such a BAPI?

Would really appreciate if you could kindly provide a hint.

Best Regards,

Pascal Gabin