[Users] Create 302 message and modify contact header

Hi, I checked archive without any result... From an openSER rule, I want to create a 302 message if a specific RURI is used. First I need to change the contact header to specify the URI of the new callee. I tried something like that: avp_printf("$avp(s:100)", "sip:test@christophe.fr;target=$ruri;cause=486;"); avp_pushto("$ct", "$avp(s:100)"); # => error generated on this line ERROR:avpops:fixup_pushto_avp: unsupported destination "$ct"; expected $ru,$du,$br So how can I modify the contact header ? Just after the update on the contact header I envisaged to use this function sl_send_reply(302, "Moved Temporarily") Is it correct ? Is there a better way to 'create' 302 message in this case ? I check UAC_REDIRECT module but I don't think I can use it in this case or perhaps I missed something Before to use a 302 message I succesfully tested to create a new INVITE with the $ruri modified correctly. But I would like to create a 302 message to prevent any problem of authentication. Thanks, Christophe