[SR-Users] presence_mwi body check problem

Hello! I'm trying to process PUBLISH on Kamailio (v. 5.2.1) but constantly getting "500 Server Internal Error" responce. For packet body: *Messages-Waiting: yes* *Message-Account: sip:100-test@172.16.30.151 &lt;sip%3A100-test(a)172.16.30.151&gt;* *Voice-Message: 1/2* ... debug output is: *kamailio: 2(27127) DEBUG: presence [event_list.c:348]: search_event(): start event= [message-summary/6]* *kamailio: 2(27127) DEBUG: presence [publish.c:351]: ki_handle_publish_uri(): SIP-If-Match header not found* *kamailio: 2(27127) DEBUG: presence [presentity.c:88]: generate_ETag(): etag= a.1548164100.27127.7.0 / 22* *kamailio: 2(27127) DEBUG: presence [publish.c:360]: ki_handle_publish_uri(): new etag = a.1548164100.27127.7.0* *kamailio: 2(27127) DEBUG: presence [publish.c:385]: ki_handle_publish_uri(): Expires header found, value= 16* *kamailio: 2(27127) ERROR: presence_mwi [add_events.c:110]: mwi_publ_handl(): check of body <Messages-Waiting: yes* *kamailio: Message-Account: sip:100-test@172.16.30.151 &lt;sip%3A100-test(a)172.16.30.151&gt;* *kamailio: Voice-Message: 1/2* *kamailio: > failed at character number 22* *kamailio: 2(27127) ERROR: presence [publish.c:480]: ki_handle_publish_uri(): in event specific publish handling* I'm not sure, but it appears to me that check in line 95 from https://github.com/kamailio/kamailio/blob/5.2/src/modules/presence_mwi/add_… is not passing. I was trying to add "\n" and "\r" to the end of each string but I always had failure on character number 22. Does anyone know how exactly PUBLISH packet body should look like? Thanks a lot!