[SR-Users] $rU rewrite problem

Hello, I have problems with rewriting $rU. Kamailio 3.0.1 on debian squeeze x86_64 In config file I have: $avp(s:dnumber) = $(ru{re.subst,/^sip:\*99\*(.*)@.*/\1/}); $rU=$avp(s:dnumber); And log file shows following warnings: Jul 5 17:22:30 voice /usr/sbin/kamailio[23641]: WARNING: <core> [rvalue.c:987]: automatic string to int conversion for "sip:1234567890@voice.serv.net" failed Jul 5 17:22:30 voice /usr/sbin/kamailio[23641]: WARNING: <core> [rvalue.c:1839]: rval expression conversion to int failed (630,22-630,23) Could you please show any samples how to change $rU with regexp matched part of $rU ? BR, Dmitri