trying to fix weird race condition on windows causing the solver window to...

trying to fix weird race condition on windows causing the solver window to close when closing the message window

Fltk/solverWindow.cpp

@@ -32,7 +32,6 @@ void solver_cb(Fl_Widget *w, void *data)
       first[i] = 1;
     init = 1;
   }
-
   if(first[num]) {
     first[num] = 0;
     char file[256], no_ext[256], ext[256], base[256];
@@ -41,6 +40,11 @@ void solver_cb(Fl_Widget *w, void *data)
     strcat(file, SINFO[num].extension.c_str());
     GUI::instance()->solver[num]->input[0]->value(file);
   }
+  // show the window before calling Solver() to avoid race condition on
+  // Windows (if the message window pops up die to an error, the window
+  // callbacks get messed up)
+  GUI::instance()->solver[num]->win->show();
+
   if(SINFO[num].nboptions) {
     std::string file = FixWindowsPath
       (GUI::instance()->solver[num]->input[0]->value());
@@ -50,7 +54,6 @@ void solver_cb(Fl_Widget *w, void *data)
     sprintf(tmp, "%s %s", SINFO[num].option_command.c_str(), tmp2);
     Solver(num, tmp);
   }
-  GUI::instance()->solver[num]->win->show();
 }
 
 static void solver_file_open_cb(Fl_Widget *w, void *data)