diff --git a/gui/src/tascar_mainwindow.cc b/gui/src/tascar_mainwindow.cc
index 37431acd..6cb14a69 100644
--- a/gui/src/tascar_mainwindow.cc
+++ b/gui/src/tascar_mainwindow.cc
@@ -26,6 +26,9 @@
 #include "tascar.res.c"
 #include <fstream>
 
+#undef WEBKIT2GTK30
+#undef WEBKIT2GTK40
+
 #define GET_WIDGET(x)                                                          \
   m_refBuilder->get_widget(#x, x);                                             \
   if(!x)                                                                       \
@@ -249,6 +252,8 @@ tascar_window_t::tascar_window_t(BaseObjectType* cobject,
   bool load_news(TASCAR::config("tascar.gui.newspage", true));
   if(load_news)
     webkit_web_view_load_uri(news_view, url.c_str());
+#else
+  notebook->remove_page(-1);
 #endif
   notebook->show_all();
   auto css = Gtk::CssProvider::create();
@@ -513,6 +518,8 @@ void tascar_window_t::load(const std::string& fname)
 {
   get_warnings().clear();
   numlastwarnings = 0;
+  while(Gtk::Main::events_pending())
+    Gtk::Main::iteration(false);
   scene_load(fname);
   tascar_filename = fname;
   sessionquit = false;
@@ -723,7 +730,7 @@ void tascar_window_t::reset_gui()
               Glib::filename_display_basename(tascar_filename) + "]");
   } else {
     set_title("tascar");
-    resize(200, 60);
+    //resize(200, 60);
   }
   update_object_list();
   if(session && (session->scenes.size() > selected_scene)) {
@@ -750,8 +757,11 @@ void tascar_window_t::reset_gui()
                              TASCAR::env_expand(session->starturl).c_str());
     notebook->set_current_page(6);
   }
-  webkit_web_view_reload_bypass_cache(news_view);
+  if(session)
+    webkit_web_view_reload_bypass_cache(news_view);
 #endif
+  while(Gtk::Main::events_pending())
+    Gtk::Main::iteration(false);
 }
 
 void tascar_window_t::on_menu_file_quit()
@@ -763,6 +773,7 @@ void tascar_window_t::on_menu_file_close()
 {
   try {
     scene_destroy();
+    resize(200, 60);
     // get_warnings().clear();
 #if defined(WEBKIT2GTK30) || defined(WEBKIT2GTK40)
     webkit_web_view_try_close(news_view);
@@ -1013,6 +1024,8 @@ void tascar_window_t::on_menu_file_reload()
     scene_destroy();
     reset_gui();
     // wait?
+    while(Gtk::Main::events_pending())
+      Gtk::Main::iteration(false);
     std::this_thread::sleep_for(std::chrono::milliseconds(500));
     scene_load(tascar_filename);
     sessionquit = false;
@@ -1087,6 +1100,8 @@ void tascar_window_t::on_menu_file_open()
     try {
       get_warnings().clear();
       numlastwarnings = 0;
+      while(Gtk::Main::events_pending())
+        Gtk::Main::iteration(false);
       scene_load(filename);
       tascar_filename = filename;
       sessionquit = false;
@@ -1133,6 +1148,8 @@ void tascar_window_t::on_menu_file_open_example()
     try {
       get_warnings().clear();
       numlastwarnings = 0;
+      while(Gtk::Main::events_pending())
+        Gtk::Main::iteration(false);
       scene_load(filename);
       tascar_filename = filename;
       sessionquit = false;
diff --git a/libtascar/src/osc_helper.cc b/libtascar/src/osc_helper.cc
index a0684ffc..3456c551 100644
--- a/libtascar/src/osc_helper.cc
+++ b/libtascar/src/osc_helper.cc
@@ -65,7 +65,14 @@ TASCAR::osc_server_t::data_element_t::data_element_t(const std::string& p,
 void err_handler(int num, const char* msg, const char* where)
 {
   liblo_errflag = true;
-  std::cout << "liblo error " << num << ": " << msg << "\n(" << where << ")\n";
+  std::string smsg;
+  if(msg)
+    smsg = msg;
+  std::string swhere = "null";
+  if(where)
+    swhere = where;
+  std::cout << "liblo error " << num << ": " << smsg << "\n(" << swhere
+            << ")\n";
 }
 
 int osc_set_bool_true(const char*, const char*, lo_arg**, int, lo_message,
@@ -603,9 +610,10 @@ osc_server_t::osc_server_t(const std::string& multicast,
             port.c_str(), string2proto(proto), err_handler);
       initialized = true;
     }
-    if((!lost) || liblo_errflag)
+    if((!lost) || liblo_errflag) {
       throw ErrMsg("liblo error (srv_addr: \"" + multicast + "\" srv_port: \"" +
                    port + "\" " + proto + ").");
+    }
   }
   if(lost) {
     char* ctmp(lo_server_thread_get_url(lost));
@@ -655,10 +663,12 @@ osc_server_t::~osc_server_t()
   cond_var_script.notify_one();
   if(scriptthread.joinable())
     scriptthread.join();
-  if(isactive)
+  if(isactive) {
     deactivate();
-  if(initialized)
+  }
+  if(initialized) {
     lo_server_thread_free(lost);
+  }
 }
 
 void osc_server_t::set_prefix(const std::string& prefix_)
@@ -883,8 +893,11 @@ void osc_server_t::add_string(const std::string& path, std::string* data,
 void osc_server_t::activate()
 {
   if(initialized) {
-    lo_server_thread_start(lost);
-    isactive = true;
+    int result = lo_server_thread_start(lost);
+    if(result < 0)
+      std::cerr << "lo_server_thread_start failed\n";
+    else
+      isactive = true;
     if(verbose)
       std::cerr << "server active\n";
   }
@@ -894,7 +907,9 @@ void osc_server_t::deactivate()
 {
   if(initialized) {
     isactive = false;
-    lo_server_thread_stop(lost);
+    int result = lo_server_thread_stop(lost);
+    if(result < 0)
+      std::cerr << "lo_server_thread_stop failed\n";
     if(verbose)
       std::cerr << "server inactive\n";
   }