xsnrg wrote: If the simulator is solving fine for you, then I would suspect you do not have the proper indexes loaded for your optical configuration. If you go to the Align tab in Ekos, then bottom right, click Options, and bottom left of the new window that pops up, should say "Index Files". If you know your Field of View, you can make sure that you have the proper indexes.

Beyond this, I think we would need to know more about your equipment.