Hello, Anybody knows what can be the problem. I have included following libraries in input under additional dependencies section of VS 2008 libsrtp-armv4-wm2003ppc-vc8-Debug.lib libsrtp-i386-Win32-vc8-Debug.lib libsrtp-i386-Win32-vc8-Release.lib But still getting error as simple_pjsua.obj : error LNK2019: unresolved external symbol "int __cdecl hex_string_to_octet_string(char *,char *,int)" (?hex_string_to_octet_string@ @YAHPAD0H at Z) referenced in function _main Thank you -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20091027/c80bc46d/attachment.html>