It may be poor practice, but I often start my model in a single workset and then move elements as the project matures. I am at that point and am having problems. If I create a 3d view and display only the roof, when I select everything in the view and try to change the workset to "Roofs" I get an error saying that I must reload the worksets. After I reload the worksets I get the same error. The error doesn't seem to be consistent becasue only a few objects produce it. Example - I had two cupolas, one moved w/out a problem the other will not move. Same with typical roofs.
What am I missing? I need to set these worksets up to manage help with performance.