hi i want to build simple app that use pjsip library on symbian OS , any idea to get started note: im using carbide IDE and i build library and test the symbian_ua_gui and it work fine , but my issue is how i can build my own application that use the pjsip library , when i try to it this error occurs : assert.h: No such file or directory[/Symbian/Carbide/myprojs/pjproject/pjlib/include/pj/compat/assert.h:28] ctype.h: No such file or directory[/Symbian/Carbide/myprojs/pjproject/pjlib/include/pj/compat/ctype.h:28] setjmp.h: No such file or directory[/Symbian/Carbide/myprojs/pjproject/pjlib/include/pj/compat/setjmp.h:28] stdio.h: No such file or directory[/Symbian/Carbide/myprojs/pjproject/pjlib/include/pj/compat/string.h:38] stdlib.h: No such file or directory[/Symbian/Carbide/myprojs/pjproject/pjlib/include/pj/compat/string.h:42] string.h: No such file or directory[/Symbian/Carbide/myprojs/pjproject/pjlib/include/pj/compat/string.h:29] thanks & regard