SAP CRM: BPATH - debugging relation traversal
Quick note: if you're trying to find out what's going on with your BPATH statement and you want to debug the traversal thereof, the central entrypoint is method CL_WCF_BPATH_PARSER=>STATUSMACHINE. This splits the string and acts on the segments.
Method CL_WCF_BPATH_PARSER=>PROCESS_ACTION is then called to delegate processing of the different segment types to different methods.
