diff --git a/LUA_Exchange.cpp b/LUA_Exchange.cpp
index 645873f..ee764b7 100644
--- a/LUA_Exchange.cpp
+++ b/LUA_Exchange.cpp
@@ -258,7 +258,7 @@ LuaExport3dm( lua_State* L)
    LuaGetParam( L, 3, nFilter) ;
    LuaClearStack( L) ;
   // creo il file
-   bool bOk = ExeExport3dm( nGroupId, sFilePath) ; 
+   bool bOk = ExeExport3dm( nGroupId, sFilePath, nFilter) ; 
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;