Hey Jony, while during "make deb" it complains of lua files output .................................. In file included from app_lua_api.c:37: app_lua_api.h:27:17: warning: lua.h: No such file or directory app_lua_api.h:28:21: warning: lauxlib.h: No such file or directory app_lua_api.h:29:20: warning: lualib.h: No such file or directory In file included from app_lua_api.c:37: app_lua_api.h:35: error: expected specifier-qualifier-list before ‘lua_State’ app_lua_api.h:58: error: expected ‘)’ before ‘*’ token --------------------------------- I have all the 3 versions devs of lua installed debbox:~/kamailio# apt-file search lualib.h liblua5.1-0-dev: /usr/include/lua5.1/lualib.h liblualib40-dev: /usr/include/lua40/lualib.h liblualib50-dev: /usr/include/lua50/lualib.h dpkg - L | grep -i liblua debbox:~/kamailio# dpkg -l |grep lua ii liblua40 4.0-13 Main interpreter library for the Lua 4.0 programming language ii liblua40-dev 4.0-13 Main interpreter library for lua40: static library and headers ii liblua5.1-0 5.1.3-1 Simple, extensible, embeddable programming language ii liblua5.1-0-dev 5.1.3-1 Simple, extensible, embeddable programming language ii liblua50 5.0.3-3 Main interpreter library for the Lua 5.0 programming language ii liblua50-dev 5.0.3-3 Main interpreter library for Lua 5.0: static library and heade ii liblualib40 4.0-13 Extension library for the Lua 4.0 programming language ii liblualib40-dev 4.0-13 Extension library for Lua 4.0: static and headers ii liblualib50 5.0.3-3 Extension library for the Lua 5.0 programming language ii liblualib50-dev 5.0.3-3 Extension library for Lua 5.0: static and headers ii lua50 5.0.3-3 Small embeddable language with simple procedural syntax I reckon the path is not correct in one of the header files. vi modules/app_lua/app_lua_api.h ..................... #include <lua.h> #include <lauxlib.h> #include <lualib.h> ........................ could you enlighten me ? Thanx.