Today I spent the entire day modeling a bridge. I modeled some parts of the bridge using Sofistik (SBIM). When I saved the model and reopened it, a message appeared upon opening saying, "Die Elemente schneiden sich nichht," and when the model opened, half of the elements that were drawn were deleted. This has happened to me for the fourth time, and I'm asking for help because I use Revit both at work and for my studies. Thank you in advance!