The dynamo closes and Revit when I try to arrange the elements

Revit
, ,
1

Hi. I want to place the lamp (family on the face) in certain coordinates.
IN [0] - the surface on which the fixtures will be placed.
IN [1] - coordinates on the surface
IN [2] - Family type.
The surface on which I want to place the element is in the linked file.
When I press start, the program closes.
Could you tell me why this is happening?

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1.png1065×658 35 KB
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Last picture means “Catastrophic error occurred. The application will be closed. Save changes?”

   import clr

clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument

clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)

host = IN[0]
ftype = UnwrapElement(IN[1])
pts =IN[2]
ref1=[]
tt = []

TransactionManager.Instance.EnsureInTransaction(doc)
for i in xrange(len(pts) ):
	ref1 = host[i].Tags.LookupTag("RevitFaceReference")
	uv1 = host[i].UVParameterAtPoint(pts[i])
	dir1 = host[i].TangentAtUParameter(uv1.U,uv1.V).ToXyz()
	try:
		inst1 = doc.Create.NewFamilyInstance(ref1,pts[i].ToXyz(),dir1,ftype)
		tt.append(inst1.ToDSType(False) )
	except: tt.append(None)
TransactionManager.Instance.TransactionTaskDone()
OUT=tt
2

Can you please post your code using the “</>” to save people from having to reformat it?

And also, for us mortals who do not read the language displayed in the error can you translate that?

3

Sorry, I edited. Program gives an error “Catastrophic error occurred. The application will be closed. Save changes?”