I think that this problem is indicative of DTM. It is a complex program and if one indicator is not right, the file will not work. I know that the program is being evaluated for the future upgardes. One thing that Vectorworks needs to keep in mind is that many of us do not work in the DTM module on a daily basis, therefore the dialoge boxes should be set up so the first step is first, the second, second, etc. Try and take the complexity out of the setup routines and go to extra ends to make good documentation.