[SR-Users] No SDP offer answer -> therefore we can not do Rx AAR 1(875) ERROR

Hi Guys, can anybody help us find why we do not get SDP offer answer, see error below: dev_pcscf: 3(879) DEBUG: ims_qos [mod.c:643]: w_rx_aar(): No SDP offer answer -> therefore we can not do Rx AAR 1(875) ERROR: <script>: ACK ( sip:+4620950160102@ims.mnc004.mcc232.3gppnetwork.org <sip:+421950160102@ims.mnc003.mcc231.3gppnetwork.org> (10.50.21.133:5080) to sip:+4620950160101@ims.mnc004.mcc232.3gppnetwork.org;user=phone <sip:+421950160101@ims.mnc003.mcc231.3gppnetwork.org;user=phone>, 3FD60673-55F09407000575C3-18269700) Since we do not get the information the SubscriptionID should be imsi(a)mncxx.mccxx.3gppnetwork.org in our AAR and instead it is contructed as imsi@ip:port which creates a REJECTION in AAA. Any help about where to correct this fault, or where exactly in the code this reception happens and/or anything will be appreciated BIG TIME :-) Thank you Jan