Hi, I need help finding solutions for why my Revit is lagging. I have this unit model where I have all my units as groups and I have them placed in my overall building shell and oriented them on different levels. Recently there is a lag happening whenever I want to delete unit groups or copy and paste them. This never happened before. I wonder maybe I have a family in the groups causing this? is there a way where I can find what's causing this problem like a add-ins? I have purged and resaved the model as a new model but wasn't solved.
