I'm a Revit Arch user, but needing to use the MEP portion of this. When I make a little pipe run, the connections are undersized. I've found that this relates to lookup tables. I found that I was supposed to edit the family and click, under Lookup Tables, the "Manage" button and choose one. But I don't know which one to choose, also each file that I choose, faced with this message: "Invalid formula found in the "Fitting Outside Diameter 1" parameter in the "Standard" type.
You will need to import the correct table or edit the formula in order to continue." I've opened one file to edit but Idon't know how.