TypeError: iteration over non-sequence of type FamilyInstance

[awilliams]

What are your inputs? This could be the explanation:

Elements in Space with Ceilings

If you look at the Python code within the Elements in Spaces node, you’ll see this line: inSpace = family.Space[phase] which is querying the space property of the family element. Ceilings do not have this property, I’m pretty sure thats why this node will not work with ceilings