[SR-Users] Kamailio Transformation Assignment to an AVP

Hello, I have the following transformation on the SDP Body: $(rb{re.subst,/^(.*)m=audio ([0-9]+) RTP\/AVP ([0-9 ]+)\015\012(.*)$/\3/s}) However when I assign this to an AVP, i.e. $avp(s:sdp-payloads) = $(rb{re.subst,/^(.*)m=audio ([0-9]+) RTP\/AVP ([0-9 ]+)\015\012(.*)$/\3/s}); I receive back a NULL result / transformation "regex does not match" is what I receive with high verbose syslog on kamailio. HOWEVER. When I do something like this: xlog("L_INFO", "Payloads Available: $(rb{re.subst,/^(.*)m=audio ([0-9]+) RTP\/AVP ([0-9 ]+)\015\012(.*)$/\3/s})"); It executes properly -- transformation regex matches and the payloads are displayed as expected. If anyone can provide any insight as to what I may be doing wrong it would be greatly appreciated. P.S. Kamailio SVN Revision # 2:5906M (1.5.2-notls). Also I CC'ed devel list (as I do believe this may be a bug). Thanks! Sincerely, Brandon Armstead