[SR-Users] $avp reset to <null> with no reason?

Hi,**** ** ** I encountered a problem. While doing some avp's settings I notice that one avp that I use is changing to <null> without me doing anything.**** ** ** Here is the part of the cfg file:**** ………….**** ………….**** Route[SET]{**** …………..**** $avp(Sfeaturetype)=$avp(next_feature_type);**** …………**** Route(DIDSRV);**** }**** ** ** route[DIDSRV] {**** xlog("L_CRIT","$C(rg) SCRIPT: in DIDSRV type = $avp(Sfeaturetype), index = $avp(SfeatureIndx) $C(xx)\n");**** if($var(srvcount)>3){**** xlog("L_NOTICE","$C(rg)Too many services loops $C(xx)\n");**** update_stat("nts_subs_srv_loop", "+1");**** $avp(TRMCS)="10";**** t_reply(403,"too many loops");**** exit;**** }**** $var(srvcount)=($var(srvcount)+1);**** xlog("L_CRIT","$C(rg) SCRIPT: in DIDSRV before switch to $avp(SfeatureType) or $avp(next_feature_type) $C(xx)\n");**** switch ($avp(SfeatureType)){**** case "0" :**** ……….**** ………**** ** ** On the route "SET" I put the value from the $avp(next_feature_type) in $avp(Sfeaturetype).**** After that I call the route "DIDSRV" and use switch($avp(Sfeaturetype)). Before the switch I xlog the value of the avp twice.**** As you can see in the log below, on the first xlog print, the value is 0 (as I expect). On the second print it resets to <null>**** WHY?**** ** ** Log:**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:413]: qm_malloc(0x7fe6f9aff000, 72) returns address 0x7fe6fcc4d330 frag. 0x7fe6fcc4d300 (size=72) on 1 -th hit**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: CRITICAL: <script>: #033[0;31;42m SCRIPT: before DIDSRV type = 0, index = 8888888889 #033[0;39;49m**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: CRITICAL: <script>: #033[0;31;42m SCRIPT*: in DIDSRV type = 0*, index = 8888888889 #033<8888888889%C2%A0%20%23033> [0;39;49m**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:369]: qm_malloc(0x7fe7ff765010, 848) called from <core>: rvalue.c: rval_new_empty(236)**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:413]: qm_malloc(0x7fe7ff765010, 848) returns address 0x7fe7ff8f25b0 frag. 0x7fe7ff8f2580 (size=1232) on 1 -th hit**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:437]: qm_free(0x7fe7ff765010, 0x7fe7ff8f25b0), called from <core>: rvalue.c: rval_destroy(141)**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:461]: qm_free: freeing frag. 0x7fe7ff8f2580 alloc'ed from <core>: rvalue.c: rval_new_empty(236)**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: CRITICAL: <script>: #033[0;31;42m SCRIPT*: in DIDSRV before switch to <null>* or 0 #033[0;39;49m **** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:369]: qm_malloc(0x7fe7ff765010, 928) called from <core>: rvalue.c: rval_new_empty(236)**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:413]: qm_malloc(0x7fe7ff765010, 928) returns address 0x7fe7ff8f25b0 frag. 0x7fe7ff8f2580 (size=1232) on 1 -th hit**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:437]: qm_free(0x7fe7ff765010, 0x7fe7ff8f25b0), called from <core>: rvalue.c: rval_destroy(141)**** Aug 12 13:38:50 net-ivr-KamIN-Test kamailio[29309]: <core> [mem/q_malloc.c:461]: qm_free: freeing frag. 0x7fe7ff8f2580 alloc'ed from <core>: rvalue.c: rval_new_empty(236)