- updated the Milling Plugin and all the related parts in the CNCJob Object and in all preprocessors. Now, the parent 'tools' attribute is inherited and also the GCode is stored here

- made sure that old projects load but without the CNCjob objects which would have crashed the app due different data structures
- the FlatCAm Evo projects load now in succession, no longer on threads

app_Main.py

@@ -11145,7 +11145,13 @@ class MenuFileHandlers(QtCore.QObject):
         self.log.debug(" **************** Started PROEJCT loading... **************** ")
 
         for obj in d['objs']:
-            self.log.debug(
+            if 'cnc_tools' in obj or 'exc_cnc_tools' in obj:
+                self.app.log.error(
+                    'MenuFileHandlers.open_project() --> %s %s. %s' %
+                    ("Failed to open the CNCJob file:", str(obj['options']['name']), "Maybe it is an old project."))
+                continue
+
+            self.app.log.debug(
                 "Recreating from opened project an %s object: %s" % (obj['kind'].capitalize(), obj['options']['name']))
 
             def obj_init(new_obj, app_inst):
@@ -11162,13 +11168,14 @@ class MenuFileHandlers(QtCore.QObject):
                                 new_obj.tools = {
                                     int(tool): tool_dict for tool, tool_dict in list(new_obj.tools.items())
                                 }
-                            except AttributeError:
+                            except Exception:
                                 pass
                         except Exception as erro:
                             app_inst.log.error('MenuFileHandlers.open_project() --> ' + str(erro))
                             return 'fail'
 
-                app_inst.worker_task.emit({'fcn': worker_task, 'params': []})
+                worker_task()
+                # app_inst.worker_task.emit({'fcn': worker_task, 'params': []})
 
             # for some reason, setting ui_title does not work when this method is called from Tcl Shell
             # it's because the TclCommand is run in another thread (it inherit TclCommandSignaled)
@@ -11176,7 +11183,9 @@ class MenuFileHandlers(QtCore.QObject):
                 self.app.ui.set_ui_title(name="{} {}: {}".format(
                     _("Loading Project ... restoring"), obj['kind'].upper(), obj['options']['name']))
 
-            self.app.app_obj.new_object(obj['kind'], obj['options']['name'], obj_init, plot=plot)
+            ret = self.app.app_obj.new_object(obj['kind'], obj['options']['name'], obj_init, plot=plot)
+            if ret == 'fail':
+                continue
 
         self.inform.emit('[success] %s: %s' % (_("Project loaded from"), filename))