RFC tracing for ABAP-to-ABAP communication

[] [] [] [] [] []

Symptom
You think that an error has occurred in the Remote Function Call (RFC) communication between two ABAP systems. You require RFC traces to analyze this problem.
Other terms
Error trace, trace, error, analysis, RFC, Remote Function Call
Reason and Prerequisites
From an ABAP system (client) you call a function module of a different ABAP system (server) using RFC.
Solution
Required [...]