Hello, I have tried to use pjsip 2.2 and faced the memory access violation error. I used the first sample from http://www.pjsip.org/docs/book-latest/html/intro_pjsua2.html. Please find details below: unsolicited_mwi_on_rx_request (src\pjsua-lib\pjsua_pres.c, line 2264) has the following instructions (line 2303): ... pj_bzero(&mwi_info, sizeof(mwi_info)); mwi_info.rdata = rdata; // emwi_info.vsub remains null (*pjsua_var.ua_cfg.cb.on_mwi_info)(acc_id, &mwi_info); // in my case it calls Endpoint::on_mwi_info } void Endpoint::on_mwi_info(pjsua_acc_id acc_id, pjsua_mwi_info *mwi_info) // mwi_info with null evsub { OnMwiInfoParam prm; prm.state = pjsip_evsub_get_state(mwi_info->evsub); // passes null pointer to pjsip_evsub_get_state ... } PJ_DEF(pjsip_evsub_state) pjsip_evsub_get_state(pjsip_evsub *sub) { return sub->state; // memory access violation } I am a newbie in pjsip usage, could you please let me know whether there is anything missed? This was sample copied from the site and compiled. Should I use any specific settings to not fall into this scenario? Thanks in advance, Slava -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140401/251de88f/attachment-0001.html>