I'm using visual studio 2008 to compile PJSIP libraries. And I write an application to use these libraries. When I compile my application, I got a lot of warnings, like this: Warning 1 warning LNK4099: PDB 'vc90.pdb' was not found with 'G:\trunk\sdk\pjsip\pjproject-1.0.1\pjlib\lib\pjlib-i386-win32-vc8-debug.lib' or at 'G:\trunk\sdk\Debug\vc90.pdb'; linking object as if no debug info pjlib-i386-win32-vc8-debug.lib vivs_core Did I missed some compile options when I compile PJSIP? -- look to the things around you,the immediate world around you, if you are alive,it will mean something to you ??Paul Strand