Hi,
By making a script for placing walls I ran into a strange problem. When a Wall.ByCurveAndHeight function is called and a vector is applied the wall will generate on a different level and the data in the properties of the wall don’t match.
The problem doesn’t appear when the same code is made in Python. 
Does anyone have an explanation for this?
Code Block:
vectorx = Vector.ByCoordinates(vectorxin,0,0);
x1 = 0;
y1 = 0;
z1 = 0;
x2 = 2000;
y2 = 0;
z2 = 0;
wallheigth;
level;
walltypes;
vectorxin;
StartPunt = Point.ByCoordinates(x1,y1,z1);
EindPunt = Point.ByCoordinates(x2,y2,z2);
EindPuntVec = EindPunt.Add(vectorx);
lijn = Line.ByStartPointEndPoint(StartPunt,EindPuntVec);
Wall.ByCurveAndHeight(lijn,wallheigth,level,walltypes);
Python Code:
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
# Import RevitAPI
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *
# Import DocumentManager and TransactionManager
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application
#The inputs to this node will be stored as a list in the IN variables.
dataEnteringNode = IN
# Place your code below this line
x1 = IN[0]
y1 = IN[1]
z1 = IN[2]
x2 = IN[3]
y2 = IN[4]
z2 = IN[5]
hoogte = IN[6]
level = IN[7]
walltype = IN[8]
vector = IN[9]
metersToFeet1 = 0.3048
feetToMeters = 1 / metersToFeet1
mmToFeet = feetToMeters/1000
LeveId = UnwrapElement(level).Id
WallTypesId = UnwrapElement(walltype).Id
hoogte = hoogte*mmToFeet
XYZstart = XYZ(x1*mmToFeet,y1*mmToFeet,z1*mmToFeet)
XYZeind = XYZ(x2*mmToFeet,y2*mmToFeet,z2*mmToFeet).Add(XYZ(vector*mmToFeet,0,0))
Curve = Line.CreateBound(XYZstart,XYZeind)
TransactionManager.Instance.EnsureInTransaction(doc)
Wall = Wall.Create(doc,Curve,WallTypesId,LeveId,hoogte,0,False,False)
TransactionManager.Instance.TransactionTaskDone()
# Assign your output to the OUT variable.
OUT = Wall
Wall test.dyn (24.0 KB)