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I created a family, loaded it into a project. Created a section view, put that onto a sheet, annotated it. Saved the file. Closed the file. Reopened the file... All my dimensions have disappeared and I need to recreate the whole thing again. What would cause this to happen?... using Revit 2011.
Turns out Revit turns off viewing of Masses... I turned that back on and voila, problem fixed 🙂