Canvas::Handle outside_canvas(synfig::open_canvas(filename, errors, warnings));
if(!outside_canvas)
throw String(_("Unable to open this composition")) + ":\n\n" + errors;
Canvas::Handle outside_canvas(synfig::open_canvas(filename, errors, warnings));
if(!outside_canvas)
throw String(_("Unable to open this composition")) + ":\n\n" + errors;