Hello,
my code does nothing and it takes a lot of time 
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Structure import *
clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *
clr.AddReference('System')
from System.Collections.Generic import List
clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument
elements = UnwrapElement(IN[0])
Inplaced = []
for i in elements:
try:
Inplaced.append(i.IsInPlace)
except:
Inplaced.append(False)
OUT = Inplaced
KR
Andreas
IsInPlace only works for Families. All Elements in Active View collects FamilyInstances which does not have the property .IsInPlace.
Same Python script as yours:
2 Likes
@leonard.moelders ,
it remains empty 
in my view there are severial. i got not error
You need to get the Families:
You get no error because of your try-except method
Get the families and it works:
Code:
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Structure import *
clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *
clr.AddReference('System')
from System.Collections.Generic import List
clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument
elements = UnwrapElement(IN[0])
Inplaced = []
for i in elements:
if isinstance(i, FamilyInstance):
type_id = i.GetTypeId()
fam_type = doc.GetElement(type_id)
fam = fam_type.Family
Inplaced.append(fam.IsInPlace)
OUT = Inplaced
1 Like
If you are still using your old code you need to have an input like this:

Family not Family Type
Maybe I am missing here something but when I look into the API I can only find IsInPlace
as a property of the Family Class and not Family Type neither Family Instance.
1 Like