Hello, > Could you please also show the backtrace?
Gladly. Here it is. Regards, Nathann === Backtrace === ASSERT INFO: /usr/include/wx-3.0/wx/strvararg.h(456): assert "(argtype & (wxFormatStringSpecifier<T>::value)) == argtype" failed in wxArgNormalizer(): format specifier doesn't match argument type BACKTRACE: [1] MainFrame::RunAssistant(wxWindow*) [2] GLPreviewFrame::OnAlign(wxCommandEvent&) [3] GLPreviewFrame::OnLoadImages(wxCommandEvent&) [4] wxAppConsoleBase::CallEventHandler(wxEvtHandler*, wxEventFunctor&, wxEvent&) const [5] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) [6] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) [7] wxEvtHandler::TryHereOnly(wxEvent&) [8] wxEvtHandler::ProcessEventLocally(wxEvent&) [9] wxEvtHandler::ProcessEvent(wxEvent&) [10] wxWindowBase::TryAfter(wxEvent&) [11] wxWindowBase::TryAfter(wxEvent&) [12] wxWindowBase::TryAfter(wxEvent&) [13] wxWindowBase::TryAfter(wxEvent&) [14] wxEvtHandler::SafelyProcessEvent(wxEvent&) [15] g_closure_invoke [16] g_signal_emit_valist [17] g_signal_emit [18] g_closure_invoke [19] g_signal_emit_valist [20] g_signal_emit [21] g_closure_invoke [22] g_signal_emit_valist [23] g_signal_emit [24] gtk_propagate_event [25] gtk_main_do_event [26] g_main_context_dispatch [27] g_main_loop_run [28] gtk_main [29] wxGUIEventLoop::DoRun() [30] wxEventLoopBase::Run() [31] wxAppConsoleBase::MainLoop() [32] wxEntry(int&, wchar_t**) [33] main [34] __libc_start_main [35] _start