Hello, I downloaded?http://www.pjsip.org/release/2.1/pjproject-2.1.zip and built pjsua in Visual studio 2008 SP1 . I ran pjsua (Debug build) with "Application Verifier"? Without adding any account or making call i pressed "q" and I got error at?pj_pool_destroy_int. The same executable throws error in Windows7 64 bit without application verifier. Below is complete stack trace. I wonder if anyone else faced the same issue. vrfcore.dll!10003355() ?[Frames below may be incorrect and/or missing, no symbols loaded for vrfcore.dll] ?vfbasics.dll!00378ea7() ?vfbasics.dll!003779b6() ?vfbasics.dll!0037fcb9() >pjsua-i386-Win32-vc8-Debug.exe!_free_base(void * pBlock=0x04a6fbd8) ?Line 109 + 0x12 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!_free_dbg_nolock(void * pUserData=0x04a6fbf8, int nBlockUse=1) ?Line 1426 + 0x9 bytesC++ ?pjsua-i386-Win32-vc8-Debug.exe!_free_dbg(void * pUserData=0x04a6fbf8, int nBlockUse=1) ?Line 1258 + 0xd bytesC++ ?pjsua-i386-Win32-vc8-Debug.exe!free(void * pUserData=0x04a6fbf8) ?Line 49 + 0xb bytesC++ ?pjsua-i386-Win32-vc8-Debug.exe!default_block_free(pj_pool_factory * factory=0x006a73e0, void * mem=0x04a6fbf8, unsigned int size=1024) ?Line 78 + 0x9 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!pj_pool_destroy_int(pj_pool_t * pool=0x04a6fbf8) ?Line 296 + 0x1a bytesC ?pjsua-i386-Win32-vc8-Debug.exe!cpool_release_pool(pj_pool_factory * pf=0x006a73e0, pj_pool_t * pool=0x04a6fbf8) ?Line 238 + 0x9 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!pj_pool_release(pj_pool_t * pool=0x04a6fbf8) ?Line 92 + 0x16 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!pjsua_destroy2(unsigned int flags=0) ?Line 1642 + 0xb bytesC ?pjsua-i386-Win32-vc8-Debug.exe!pjsua_destroy() ?Line 1694 + 0x7 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!app_destroy() ?Line 6227 + 0x5 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!main_func(int argc=1, char * * argv=0x04a18fa0) ?Line 104C ?pjsua-i386-Win32-vc8-Debug.exe!pj_run_app(int (int, char * *)* main_func=0x004c1220, int argc=1, char * * argv=0x04a18fa0, unsigned int flags=0) ?Line 1455 + 0xb bytesC ?pjsua-i386-Win32-vc8-Debug.exe!main(int argc=1, char * * argv=0x04a18fa0) ?Line 112 + 0x14 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!__tmainCRTStartup() ?Line 266 + 0x19 bytesC ?pjsua-i386-Win32-vc8-Debug.exe!mainCRTStartup() ?Line 182C ?kernel32.dll!7c81776f() ?pjsua-i386-Win32-vc8-Debug.exe!pjsip_multipart_find_part(const pjsip_msg_body * mp=0x3d003d00, const pjsip_media_type * content_type=0x50002000, const pjsip_multipart_part * start=0x5f004a00) ?Line 389 + 0x30 bytesC ?20006500() -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130505/5dd4513f/attachment-0001.html>