Ok, I can see that, the fact my assy always wants to update on opening is the reason the MO's are requiring regeneration upon opening up this file. I will work on it to get the assy satisfied upon closing to not require the update when opening. I need to move on for now with this project and will totally fix it at a later date soon. I am satisfied for now that this is the issue and will mark this solved. If for some reason it was not the reason I will post the true fix then.