RR__printf's will show in the log if you have logging enabled .
RR_FailedMsg and LOG_ERROR will show up in Conductor and I think they show up in the Output report of Analyze.
I also found SCRIPT_MESSAGE that is supposed to show in Analyze "error report," I'm not sure if that is Output or .rip, or what... but this is listed in the .net group, not the www group - it compiles though so may work...
A problem is a difference between what is perceived and what is desired, that
we want to reduce (Dewey 1933)