FilterbyCategoryname doesnt work as expected

[Garbage_Collector]

Hello,

I am using a python script made by @Kulkul to get the OST Category name for Titleblocks.
See: How get OST (Built-In Name) of element - #6 by Kulkul

When i use the output of this node as input for Filter by category name, it doesnt work. I get an empty list, but when i use the drop down Categories node it works as expected.

I am supposed to be able to enter the OST name right?

The desired output but with a dropdown node:

Using the OST name and getting empty lists:

I tried flattening the list but that gives the same result.

The Python script:

@Kulkul

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)
    except:
        pass
 
for i, b in zip(cats, bics):
    if catname == str(i): 
        ost = b 
 
OUT = ost

[SeanP]

Why do you think you need the Built-in category (OST) name and not just the common name (Title Blocks)? Can you not just use a String or Code Block and type in Title Blocks and be done?

[Garbage_Collector]

Well, this is awkward…

Cant believe i didnt try that first.
I ran into this problem with multicategory tags needing the OST name and therefor I figured i had to input the OST name for titleblocks aswell.

Thanks for your help