diff --git a/xs/src/slic3r/GUI/GUI.cpp b/xs/src/slic3r/GUI/GUI.cpp
index a3c02f49b..e03627d3d 100644
--- a/xs/src/slic3r/GUI/GUI.cpp
+++ b/xs/src/slic3r/GUI/GUI.cpp
@@ -403,7 +403,7 @@ void add_config_menu(wxMenuBar *menu, int event_preferences_changed, int event_l
 				save_language();
 				show_info(g_wxTabPanel, _(L("Application will be restarted")), _(L("Attention!")));
 				if (event_language_change > 0) {
-					g_3DScene->remove_all_canvases();// remove all canvas before recreate GUI
+					_3DScene::remove_all_canvases();// remove all canvas before recreate GUI
 					wxCommandEvent event(event_language_change);
 					g_wxApp->ProcessEvent(event);
 				}
diff --git a/xs/src/slic3r/GUI/Tab.cpp b/xs/src/slic3r/GUI/Tab.cpp
index 4935d8dcd..9e8937490 100644
--- a/xs/src/slic3r/GUI/Tab.cpp
+++ b/xs/src/slic3r/GUI/Tab.cpp
@@ -2724,14 +2724,24 @@ void SavePresetWindow::accept()
 	if (!m_chosen_name.empty()) {
 		const char* unusable_symbols = "<>:/\\|?*\"";
 		bool is_unusable_symbol = false;
+		bool is_unusable_postfix = false;
+		const std::string unusable_postfix = "(modified)";
 		for (size_t i = 0; i < std::strlen(unusable_symbols); i++){
 			if (m_chosen_name.find_first_of(unusable_symbols[i]) != std::string::npos){
 				is_unusable_symbol = true;
 				break;
 			}
 		}
+		if (m_chosen_name.find(unusable_postfix) != std::string::npos)
+			is_unusable_postfix = true;
+
 		if (is_unusable_symbol) {
-			show_error(this, _(L("The supplied name is not valid; the following characters are not allowed:"))+" <>:/\\|?*\"");
+			show_error(this,_(L("The supplied name is not valid;")) + "\n" +
+							_(L("the following characters are not allowed:")) + " <>:/\\|?*\"");
+		}
+		else if (is_unusable_postfix){
+			show_error(this,	_(L("The supplied name is not valid;")) + "\n" + 
+								_(L("the following postfix are not allowed:")) + "\n\t" + unusable_postfix);
 		}
 		else if (m_chosen_name.compare("- default -") == 0) {
 			show_error(this, _(L("The supplied name is not available.")));