diff --git a/gb.qt4/src/CMessage.cpp b/gb.qt4/src/CMessage.cpp
index 5714fb3f4..397f8d6d0 100644
--- a/gb.qt4/src/CMessage.cpp
+++ b/gb.qt4/src/CMessage.cpp
@@ -127,6 +127,9 @@ static int make_message(int type, int nbmax, void *_param)
 	int i, n;
 	QMessageBox *mb;
 	
+	if (MAIN_CHECK_INIT())
+		return 0;
+
 	if (MAIN_in_message_box)
 	{
 		GB.Error("Message box already displayed");
diff --git a/gb.qt4/src/CWidget.cpp b/gb.qt4/src/CWidget.cpp
index c1839dd59..99fb5fd04 100644
--- a/gb.qt4/src/CWidget.cpp
+++ b/gb.qt4/src/CWidget.cpp
@@ -803,6 +803,12 @@ bool CWIDGET_is_design(CWIDGET *_object)
 
 //---------------------------------------------------------------------------
 
+BEGIN_METHOD_VOID(Control_new)
+
+	MAIN_CHECK_INIT();
+
+END_METHOD
+
 BEGIN_PROPERTY(Control_X)
 
 	if (READ_PROPERTY)
@@ -3159,6 +3165,7 @@ GB_DESC CControlDesc[] =
 
 	GB_HOOK_CHECK(CWIDGET_check),
 
+	GB_METHOD("_new", NULL, Control_new, NULL),
 	GB_METHOD("_free", NULL, Control_Delete, NULL),
 
 	GB_METHOD("Move", NULL, Control_Move, "(X)i(Y)i[(Width)i(Height)i]"),
diff --git a/gb.qt4/src/cprinter.cpp b/gb.qt4/src/cprinter.cpp
index 39b3a43d7..1598afdc9 100644
--- a/gb.qt4/src/cprinter.cpp
+++ b/gb.qt4/src/cprinter.cpp
@@ -164,6 +164,9 @@ static void update_duplex(CPRINTER *_object)
 
 BEGIN_METHOD_VOID(Printer_new)
 
+	if (MAIN_CHECK_INIT())
+		return;
+
 	THIS->printer = new QPrinter(QPrinter::HighResolution);
 	THIS->page_count = 1;
 
diff --git a/gb.qt4/src/main.cpp b/gb.qt4/src/main.cpp
index 79ab38ae2..314320d62 100644
--- a/gb.qt4/src/main.cpp
+++ b/gb.qt4/src/main.cpp
@@ -120,8 +120,8 @@ int MAIN_scale = 6;
 #ifndef NO_X_WINDOW
 int MAIN_x11_last_key_code = 0;
 #endif
-
 bool MAIN_debug_busy = false;
+bool MAIN_init = false;
 
 GB_CLASS CLASS_Control;
 GB_CLASS CLASS_Container;
@@ -319,6 +319,11 @@ void MAIN_process_events(void)
 	_no_destroy--;
 }
 
+void MAIN_init_error()
+{
+	GB.Error("GUI is not initialized");
+}
+
 /** MyApplication **********************************************************/
 
 bool MyApplication::_tooltip_disable = false;
@@ -809,12 +814,14 @@ static void hook_main(int *argc, char ***argv)
 		XInitThreads();
 
 	new MyApplication(*argc, *argv);
-	
+
 	QT_Init();
 	init_lang(GB.System.Language(), GB.System.IsRightToLeft());
-	
+
+	MAIN_init = true;
+
 	//_old_handler = XSetErrorHandler(X11_error_handler);
-	
+
 	CALL_HOOK_MAIN(_old_hook_main, argc, argv);
 }
 
diff --git a/gb.qt4/src/main.h b/gb.qt4/src/main.h
index 24496b7b7..81a91ef4e 100644
--- a/gb.qt4/src/main.h
+++ b/gb.qt4/src/main.h
@@ -44,6 +44,7 @@ extern int MAIN_in_message_box;
 extern int MAIN_loop_level;
 extern int MAIN_scale;
 extern bool MAIN_debug_busy;
+extern bool MAIN_init;
 #ifndef NO_X_WINDOW
 extern int MAIN_x11_last_key_code;
 #endif
@@ -140,6 +141,9 @@ private:
 void MAIN_check_quit(void);
 void MAIN_update_scale(void);
 void MAIN_process_events(void);
+void MAIN_init_error(void);
+
+#define MAIN_CHECK_INIT() (MAIN_init ? 0 : (MAIN_init_error(), 1))
 
 const char *QT_ToUTF8(const QString &str);
 void QT_RegisterAction(void *object, const char *key, int on);