Error handling transaction in python script dynamo (Revit 2021.1.7

Revit
, ,
1

Hey, so i have a small script where i want to assign a material parameter to geometry in my revit family, and afterwards reload it into my document.

however I seem to be unable to save the document as it tells me:
image

Can anyone help me? the code is below:

import clr
import sys
import os
# import Revit API
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
# import Revit API UI
clr.AddReference('RevitAPIUI')
# import Revit Services
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager 
# import ProtoGeometry 
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

dmi = DocumentManager.Instance #setting up document manager instance
doc = dmi.CurrentDBDocument #Gets current document
uiapp = dmi.CurrentUIApplication #gets current Revit app
uidoc = uiapp.ActiveUIDocument.Document
app = uiapp.Application #gets current UI app

#The inputs to this node will be stored as a list in the IN variables.
# Use Dynamo to get the family types you want to edit
# For example, let's say you have a list of FamilyTypes called `familyTypes`
familyTypes = IN[0]

# Define the parameter name you want to use to drive the material
parameterName = "Local_Material_Parameter"


# Loop through each FamilyType
for familyType in familyTypes:
    # Get the FamilySymbol for the FamilyType
    familySymbol = doc.GetElement(ElementId(familyType.Family.Id))
    
    # Close any open transactions
    TransactionManager.Instance.TransactionTaskDone()
    TransactionManager.Instance.ForceCloseTransaction()
    
    
    # Open the family document
    familyDoc = uidoc.EditFamily(familySymbol)

    TransactionManager.Instance.EnsureInTransaction(familyDoc)
    
    # Get the FamilyManager and create the parameter
    familyManager = familyDoc.FamilyManager
    try:
        parameter = familyManager.AddParameter(parameterName, BuiltInParameterGroup.INVALID, ParameterType.Material, False)
    except:
        try:
            parameter = familyManager.Parameter(parameterName)
        except:
            pass
            
    # Find all the geometry elements in the family document
    solids = FilteredElementCollector(familyDoc).OfCategory(BuiltInCategory.OST_GenericModel).WhereElementIsNotElementType().ToElements()
    
    # Loop through each Solid and assign the parameter to its geometry elements
    for solid in solids:
        try:
            # Assign the parameter to the Solid object
            solid.SetMaterialId(parameter.Id)
        except:
            pass
    
    # Commit the transaction and close the family document
    TransactionManager.Instance.TransactionTaskDone()
    
    # Define the save as options
    saveAsOptions = SaveAsOptions()
    saveAsOptions.OverwriteExistingFile = True
	
    # Get docname of familydoc
    familyDocPath= familyDoc.PathName
    
    tempDir = os.environ['LOCALAPPDATA'] + '\Temp'
    if not os.path.exists(tempDir):
        os.makedirs(tempDir)
    tempFilePath = os.path.join(tempDir, os.path.basename(familyDocPath))
    familyDoc.SaveAs(tempFilePath,saveAsOptions)
    familyDoc.Close(False)   #!!!!!!!!!!!!!!!!!LINE 84!!!!!!!!!!!!!!!!!!!!!!!!!!!!LINE 84!
	
    TransactionManager.Instance.EnsureInTransaction(doc)
    # Load the edited family into the current document
    uidoc.LoadFamily(tempFilePath)
    
    # Close any open transactions
    TransactionManager.Instance.TransactionTaskDone()