Added check when error shown for the wrong file name

--HG--
branch : develop

src/app/valentina/mainwindow.cpp

@@ -3111,7 +3111,10 @@ void MainWindow::LoadPattern(const QString &fileName, const QString& customMeasu
     }
     catch (VException &e)
     {
-        e.CriticalMessageBox(tr("File error."), this);
+        if (qApp->CheckGUI())
+            e.CriticalMessageBox(tr("File error."), this);
+        else
+            vStdErr() << tr("File error.") << e.MoreInformation() << "\n";
         Clear();
         return;
     }