Inetone: RFC

Transaction	Description
ST22	ABAP Runtime Errors (Short dumps)
SMGW	Gateway Monitor
ST05	Performance Analysis (Tracing)

SM58	View tRFC queue / errors
SM59	RFC Destinations (enable trace here also) Used with CALL TRANSACTION ... DESTINATION ...
SMQ1	qRFC Eingang
SMQ2	qRFC Ausgang
SMQS	RFC Connection active/inactivate
t.RFCDES	RFC table
t.tblsysdest	BD97 Assignments
t.tbspecdest	Special BD97 Assignments

If some tRFC are stuck, you can restart them (F6)
Only the caller can delete them by default
You can reorganize all (see menu) and then you can also delete them without being the caller
You should schedule RSEOUT00 periodically to collect and reprocess those