I understand exactly thanks … this not change things. No progress on it sorry but next to come when I finished rotator … status is (configuration form finished, translation of SOAP file to JSON configuration file finished, database for handling memory cos i need also for advanced finished, i need to split the sequence tree in 2 actions and adding new features management). I also find the way for allow in running change to sequence slot , guiding, focus etc… without stop the sequence using the injection mechanism already working in Voyager.