Traceback (most recent call last): File "/usr/share/software-center/softwarecenter/app.py", line 231, in on_app_list_changed self.update_app_status_menu() File "/usr/share/software-center/softwarecenter/app.py", line 435, in update_app_status_menu if self.active_pane.app_view.is_action_in_progress_for_selected_app(): File "/usr/share/software-center/softwarecenter/view/appview.py", line 903, in is_action_in_progress_for_selected_app action_in_progress = (model[path][AppStore.COL_ACTION_IN_PROGRESS] != -1) TypeError: could not parse subscript as a tree path