Creating walls by profil error

you need to convert geometry

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

clr.AddReference('RevitAPI')
import Autodesk.Revit.DB as DB
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

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

doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application
# rest of code
for curvelist in curves:
    list_rvt_curves = List[DB.Curve]()
    for curve in curvelist:
        list_rvt_curves.Add(curve.ToRevitType())

# rest of code

some infos here

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