Hi, I copy the benny's answer from 13/05/2008 on mailing list ;-) "Yep this has been discussed quite a number of times. Just do Google site search (the little text box on the top right corner of pjsip.org website) on pj_thread_register." You should find something like that : if(!pj_thread_is_registered()) { pj_thread_register(NULL,desc,&thread); } Samuel loki1 at bezeqint.net a ?crit : > Hi. > > In my pjsua application I'm working with some dll that > internally creates thread for callback function. I need > first to write data with dll function and then wait for the > callback response. I tried to use pj_event for this, but i > get error: "Calling pjlib from unknown/external thread..." > when i set event to signal from callback. > > Is there any way to avoid it or how can i register this > internal dll's thread? Thanks. > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > >