Multi category tags, Category by name error

[AmolShah]

I’m not 100% sure about it.
But this has been discussed over the forum quite a few times in the past.
Search for it and you will find the answer!

You can start here:

Category.ByName node doesn't work

Category.ByName is for when you simply type in the Category. So instead of feeding in the ‘dropdown’ menu, you would have to type in the ‘Under the hood’ name. Most of these start with OST_ which refers to Object Style. Walls for example are ‘OST_Walls’. So for your example, you’re feeding in simply ‘Generic Model’ instead of ‘OST_GenericModel’ (I’m not entirely sure that’s the OST name but it probably is).

And if you have trouble locating the OST name for a category (like you had with Multi-Category Tags), this script would be your go-to tool:

How get OST (Built-In Name) of element

Sure! import clr, System clr.AddReference("RevitNodes") import Revit clr.AddReference('RevitAPI') from Autodesk.Revit.DB import * clr.AddReference("RevitServices") from RevitServices.Persistence import DocumentManager doc = DocumentManager.Instance.CurrentDBDocument catname = IN[0] bic = System.Enum.GetValues(BuiltInCategory) cats, bics = [], [] for i in bic: try: cat = Revit.Elements.Category.ById(ElementId(i).IntegerValue) cats.append(cat) bics.append(i) ex…