Error in tool_offsetview.py

    def dialog_return(self, w, message):
        rtn = message.get('RETURN')
        name = message.get('NAME')
        plate_code = bool(message.get('ID') == '_touchplate_')
        sensor_code = bool(message.get('ID') == '_toolsensor_')
        wait_code = bool(message.get('ID') == '_wait_resume_')
        lower_code = bool(message.get('ID') == '_wait_to_lower_')
        unhome_code = bool(message.get('ID') == '_unhome_')
        overwrite = bool(message.get('ID') == '_overwrite_')
        if plate_code and name == 'MESSAGE' and rtn is True:
            self.touchoff('touchplate')
        elif sensor_code and name == 'MESSAGE' and rtn is True:
            self.touchoff('sensor')
        elif wait_code and name == 'MESSAGE':
            self.lowerSpindle()
        elif unhome_code and name == 'MESSAGE' and rtn is True:
            ACTION.SET_MACHINE_UNHOMED(-1)
        elif overwrite and name == 'MESSAGE':
            if rtn is True:
                self.do_file_copy()
            else:
                self.add_status(_translate("HandlerClass","File not copied"), CRITICAL)
        elif lower_code and name == 'MESSAGE':
            self.h['eoffset-spindle-count'] = 0
            self.h['spindle-inhibit'] = False # add this line <------
            self.add_status(_translate("HandlerClass",'Spindle lowered after machine stopped'))