I try it work fine on the pjsua sample but when i build it into a dll it got the same error. What should i do? Thanks, Raksa -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100120/8c71bbe3/attachment.html>