I have a simple tree family that has AutoCAD geometry imported into it. I created a height parameter that is of type 'number' (it is number because in the autocad import family type parameters the scale factor must be a number) and then made the Scale Factor parameter in the instance of the AutoCAD import = to height. This works perfectly in the family - the geometry flexes. When I bring the family into a project file the height of the family will not change when modifying the height parameter in the family. Any ideas? (this kind of thing is so unbelievably frustrating)