diff --git a/.gitignore b/.gitignore
index 93d7e05bb..e1d71ce3c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,6 +41,7 @@ local.properties
 *.suo
 *.user
 *.sln.docstates
+/src/Config/user_local.props
 
 # Build results
 
diff --git a/.version b/.version
index 8f1a86948..e9acb99e6 100644
--- a/.version
+++ b/.version
@@ -1 +1 @@
-0.6.11
\ No newline at end of file
+0.6.12
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00adad167..7abe1f22c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.6.12
+* Fix CurtainPanel.ByElements failing to return when there is a door or window present in the curtain wall
+* Stop tracking user_local.props in git so local setup for building DynamoRevit doesn't get pushed by mistake on remote server
+
 ## 0.6.11
 * Update Dynamo Core to 3.0.4.7905
 
diff --git a/src/Config/user_local.props b/src/Config/user_local.props
deleted file mode 100644
index 7cf7f0e5c..000000000
--- a/src/Config/user_local.props
+++ /dev/null
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
-    <RevitVersionNumber Condition=" '$(RevitVersionNumber)' == '' ">Preview Release</RevitVersionNumber>
-    <REVIT_VERSION>Revit</REVIT_VERSION>
-    <!-- local env -->
-    <OutputPath Condition=" '$(OutputPath)' == '' ">$(SolutionDir)..\bin\$(Platform)\$(Configuration)\$(REVIT_VERSION)</OutputPath>
-    <TestOutputPath Condition=" '$(TestOutputPath)' == '' ">$(OutputPath)</TestOutputPath>
-  </PropertyGroup>
-  <PropertyGroup>
-    <REVITAPI Condition=" !Exists('$(REVITAPI)') ">E:\RevitVersion\2025\Releasex64_NET7_20230907\Releasex64</REVITAPI>
-  </PropertyGroup>
-</Project>
\ No newline at end of file
diff --git a/src/Libraries/RevitNodes/Elements/CurtainPanel.cs b/src/Libraries/RevitNodes/Elements/CurtainPanel.cs
index 72a621ecf..a1cddce53 100644
--- a/src/Libraries/RevitNodes/Elements/CurtainPanel.cs
+++ b/src/Libraries/RevitNodes/Elements/CurtainPanel.cs
@@ -18,463 +18,471 @@ namespace Revit.Elements
     /// A Revit CurtainPanel
     /// </summary>
     public class CurtainPanel : AbstractFamilyInstance
-   {
-      #region Properties
+    {
+        #region Properties
 
-      protected CurveArrArray PanelBoundaries
-      {
-         get
-         {
-            // This creates a new wall and deletes the old one
-            TransactionManager.Instance.EnsureInTransaction(Document);
-
-            var elementAsPanel = InternalElement as Autodesk.Revit.DB.Panel;
-            if (elementAsPanel == null)
-               throw new Exception(Properties.Resources.CurtainPanelInternalElementError);
-
-            var host = elementAsPanel.Host;
-
-            CurtainGrid hostingGrid = null;
-            Autodesk.Revit.DB.CurtainGrid grid = null;
-            if (host is Autodesk.Revit.DB.Wall)
+        protected CurveArrArray PanelBoundaries
+        {
+            get
             {
-               hostingGrid = CurtainGrid.ByElement(UnknownElement.FromExisting(host, true));
+                // This creates a new wall and deletes the old one
+                TransactionManager.Instance.EnsureInTransaction(Document);
+
+                var elementAsPanel = InternalElement as Autodesk.Revit.DB.Panel;
+                if (elementAsPanel == null)
+                    throw new Exception(Properties.Resources.CurtainPanelInternalElementError);
+
+                var host = elementAsPanel.Host;
+
+                CurtainGrid hostingGrid = null;
+                Autodesk.Revit.DB.CurtainGrid grid = null;
+                if (host is Autodesk.Revit.DB.Wall)
+                {
+                    hostingGrid = CurtainGrid.ByElement(UnknownElement.FromExisting(host, true));
+                }
+                else
+                {
+                    var gridSet = CurtainGrid.AllCurtainGrids(host);
+                    var enumGrid = gridSet.GetEnumerator();
+                    bool found = false;
+                    for (; enumGrid.MoveNext();)
+                    {
+                        grid = (Autodesk.Revit.DB.CurtainGrid)enumGrid.Current;
+                        if (grid.GetPanelIds().Contains(elementAsPanel.Id))
+                        {
+                            found = true;
+                            break;
+                        }
+                    }
+                    if (!found)
+                        throw new Exception(Properties.Resources.CellForPanelNotFound);
+                }
+
+                ElementId uGridId = ElementId.InvalidElementId;
+                ElementId vGridId = ElementId.InvalidElementId;
+                elementAsPanel.GetRefGridLines(ref uGridId, ref vGridId);
+
+                if (grid == null && hostingGrid == null)
+                    throw new Exception(Properties.Resources.CellForPanelNotFound);
+
+                CurtainCell cell = hostingGrid != null
+                   ? hostingGrid.InternalCurtainGrid.GetCell(uGridId, vGridId)
+                   : grid.GetCell(uGridId, vGridId);
+
+                TransactionManager.Instance.TransactionTaskDone();
+
+                if (cell == null)
+                    throw new Exception(Properties.Resources.CellForPanelNotFound);
+                return cell.CurveLoops;
             }
-            else
+        }
+
+        private PolyCurve[] boundsCache = null;
+        /// <summary>
+        /// Gets curtain panel boundaries
+        /// </summary>
+        public PolyCurve[] Boundaries
+        {
+            get
             {
-               var gridSet = CurtainGrid.AllCurtainGrids(host);
-               var enumGrid = gridSet.GetEnumerator();
-               bool found = false;
-               for (; enumGrid.MoveNext();)
-               {
-                  grid = (Autodesk.Revit.DB.CurtainGrid)enumGrid.Current;
-                  if (grid.GetPanelIds().Contains(elementAsPanel.Id))
-                  {
-                     found = true;
-                     break;
-                  }
-               }
-               if (!found)
-                  throw new Exception(Properties.Resources.CellForPanelNotFound);
+                if (boundsCache != null)
+                    return boundsCache;
+                var enumCurveLoops = PanelBoundaries.GetEnumerator();
+                var bounds = new List<PolyCurve>();
+
+                for (; enumCurveLoops.MoveNext();)
+                {
+                    var crvs = new CurveArray();
+                    var crvArr = (CurveArray)enumCurveLoops.Current;
+                    var enumCurves = crvArr.GetEnumerator();
+                    for (; enumCurves.MoveNext();)
+                    {
+                        var crv = (Autodesk.Revit.DB.Curve)enumCurves.Current;
+                        crvs.Append(crv);
+                    }
+                    //try
+                    //{
+                    bounds.Add(Revit.GeometryConversion.RevitToProtoCurve.ToProtoType(crvs));
+                    //}
+                    /* debugging code
+                    catch (Exception e)
+                    {
+                       var cl = new CurveLoop();
+                       var enumCurvesCl = crvArr.GetEnumerator();
+                       for (; enumCurvesCl.MoveNext(); )
+                       {
+                          var crv = (Autodesk.Revit.DB.Curve)enumCurvesCl.Current;
+                          cl.Append(crv);
+                       }
+                       double len = cl.GetExactLength();
+                       len = len/1.0;
+                    }
+                    end of debugging code */
+                }
+                boundsCache = bounds.ToArray();
+                return boundsCache;
             }
-
-            ElementId uGridId = ElementId.InvalidElementId;
-            ElementId vGridId = ElementId.InvalidElementId;
-            elementAsPanel.GetRefGridLines(ref uGridId, ref vGridId);
-
-            if (grid == null && hostingGrid == null)
-               throw new Exception(Properties.Resources.CellForPanelNotFound);
-
-            CurtainCell cell = hostingGrid != null
-               ? hostingGrid.InternalCurtainGrid.GetCell(uGridId, vGridId)
-               : grid.GetCell(uGridId, vGridId);
-
-            TransactionManager.Instance.TransactionTaskDone();
-
-            if (cell == null)
-               throw new Exception(Properties.Resources.CellForPanelNotFound);
-            return cell.CurveLoops;
-         }
-      }
-
-      private PolyCurve[] boundsCache = null;
-       /// <summary>
-       /// Gets curtain panel boundaries
-       /// </summary>
-      public PolyCurve[] Boundaries
-      {
-         get
-         {
-            if (boundsCache != null)
-               return boundsCache;
-            var enumCurveLoops = PanelBoundaries.GetEnumerator();
-            var bounds = new List<PolyCurve>();
-
-            for (; enumCurveLoops.MoveNext();)
+        }
+        /// <summary>
+        /// Checks if the specific curtain panel is planar
+        /// </summary>
+        public bool HasPlane
+        {
+            get
             {
-               var crvs = new CurveArray();
-               var crvArr = (CurveArray) enumCurveLoops.Current;
-               var enumCurves = crvArr.GetEnumerator();
-               for (; enumCurves.MoveNext();)
-               {
-                  var crv = (Autodesk.Revit.DB.Curve) enumCurves.Current;
-                  crvs.Append(crv);
-               }
-               //try
-               //{
-                  bounds.Add(Revit.GeometryConversion.RevitToProtoCurve.ToProtoType(crvs));
-               //}
-               /* debugging code
-               catch (Exception e)
-               {
-                  var cl = new CurveLoop();
-                  var enumCurvesCl = crvArr.GetEnumerator();
-                  for (; enumCurvesCl.MoveNext(); )
-                  {
-                     var crv = (Autodesk.Revit.DB.Curve)enumCurvesCl.Current;
-                     cl.Append(crv);
-                  }
-                  double len = cl.GetExactLength();
-                  len = len/1.0;
-               }
-               end of debugging code */
+                var enumCurveLoops = PanelBoundaries.GetEnumerator();
+                Autodesk.Revit.DB.Plane plane = null;
+                for (; enumCurveLoops.MoveNext();)
+                {
+                    var cLoop = new CurveLoop();
+                    var crvArr = (CurveArray)enumCurveLoops.Current;
+                    var enumCurves = crvArr.GetEnumerator();
+                    for (; enumCurves.MoveNext();)
+                    {
+                        var crv = (Autodesk.Revit.DB.Curve)enumCurves.Current;
+                        cLoop.Append(crv);
+                    }
+                    if (!cLoop.HasPlane())
+                        return false;
+                    var thisPlane = cLoop.GetPlane();
+                    if (plane == null)
+                        plane = thisPlane;
+                    else if (Math.Abs(plane.Normal.DotProduct(thisPlane.Normal)) < 1.0 - 1.0e-9)
+                        return false;
+                    else
+                    {
+                        if (Math.Abs((plane.Origin - thisPlane.Origin).DotProduct(plane.Normal)) > 1.0e-9)
+                            return false;
+                    }
+                }
+                return true;
             }
-            boundsCache = bounds.ToArray();
-            return boundsCache;
-         }
-      }
-       /// <summary>
-       /// Checks if the specific curtain panel is planar
-       /// </summary>
-      public bool HasPlane
-      {
-         get
-         {
-            var enumCurveLoops = PanelBoundaries.GetEnumerator();
-            Autodesk.Revit.DB.Plane plane = null;
-            for (; enumCurveLoops.MoveNext();)
+        }
+        /// <summary>
+        /// Gets a plane of the given curtain panel, if it is planar
+        /// </summary>
+        public Plane PanelPlane
+        {
+            get
             {
-               var cLoop = new CurveLoop();
-               var crvArr = (CurveArray) enumCurveLoops.Current;
-               var enumCurves = crvArr.GetEnumerator();
-               for (; enumCurves.MoveNext();)
-               {
-                  var crv = (Autodesk.Revit.DB.Curve) enumCurves.Current;
-                  cLoop.Append(crv);
-               }
-               if (!cLoop.HasPlane())
-                  return false;
-               var thisPlane = cLoop.GetPlane();
-               if (plane == null)
-                  plane = thisPlane;
-               else if (Math.Abs(plane.Normal.DotProduct(thisPlane.Normal)) < 1.0 - 1.0e-9)
-                  return false;
-               else
-               {
-                  if (Math.Abs((plane.Origin - thisPlane.Origin).DotProduct(plane.Normal)) > 1.0e-9)
-                     return false;
-               }
+                var enumCurveLoops = PanelBoundaries.GetEnumerator();
+                Autodesk.Revit.DB.Plane plane = null;
+                for (; enumCurveLoops.MoveNext();)
+                {
+                    var cLoop = new CurveLoop();
+                    var crvArr = (CurveArray)enumCurveLoops.Current;
+                    var enumCurves = crvArr.GetEnumerator();
+                    for (; enumCurves.MoveNext();)
+                    {
+                        var crv = (Autodesk.Revit.DB.Curve)enumCurves.Current;
+                        cLoop.Append(crv);
+                    }
+                    if (!cLoop.HasPlane())
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
+                    var thisPlane = cLoop.GetPlane();
+                    if (plane == null)
+                        plane = thisPlane;
+                    else if (Math.Abs(plane.Normal.DotProduct(thisPlane.Normal)) < 1.0 - 1.0e-9)
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
+                    else
+                    {
+                        if (Math.Abs((plane.Origin - thisPlane.Origin).DotProduct(plane.Normal)) > 1.0e-9)
+                            throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
+                    }
+                }
+                if (plane == null)
+                    throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
+
+                return plane.ToPlane();
             }
-            return true;
-         }
-      }
-       /// <summary>
-       /// Gets a plane of the given curtain panel, if it is planar
-       /// </summary>
-      public Plane PanelPlane
-      {
-         get
-         {
-            var enumCurveLoops = PanelBoundaries.GetEnumerator();
-            Autodesk.Revit.DB.Plane plane = null;
-            for (; enumCurveLoops.MoveNext();)
+        }
+        /// <summary>
+        /// Gets the length of the specific curtain panel boundaries
+        /// </summary>
+        public double Length
+        {
+            get
             {
-               var cLoop = new CurveLoop();
-               var crvArr = (CurveArray) enumCurveLoops.Current;
-               var enumCurves = crvArr.GetEnumerator();
-               for (; enumCurves.MoveNext();)
-               {
-                  var crv = (Autodesk.Revit.DB.Curve) enumCurves.Current;
-                  cLoop.Append(crv);
-               }
-               if (!cLoop.HasPlane())
-                  throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
-               var thisPlane = cLoop.GetPlane();
-               if (plane == null)
-                  plane = thisPlane;
-               else if (Math.Abs(plane.Normal.DotProduct(thisPlane.Normal)) < 1.0 - 1.0e-9)
-                   throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
-               else
-               {
-                  if (Math.Abs((plane.Origin - thisPlane.Origin).DotProduct(plane.Normal)) > 1.0e-9)
-                      throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
-               }
+                double lengthVal = 0.0;
+                var enumCurveLoops = PanelBoundaries.GetEnumerator();
+                for (; enumCurveLoops.MoveNext();)
+                {
+                    var crvArr = (CurveArray)enumCurveLoops.Current;
+                    var enumCurves = crvArr.GetEnumerator();
+                    for (; enumCurves.MoveNext();)
+                    {
+                        var crv = (Autodesk.Revit.DB.Curve)enumCurves.Current;
+                        lengthVal += crv.Length;
+                    }
+                }
+                return lengthVal * UnitConverter.HostToDynamoFactor(SpecTypeId.Length);
             }
-            if (plane == null)
-                throw new Exception(Properties.Resources.CurtainPanelIsNotPlanar);
-
-             return plane.ToPlane();
-         }
-      }
-       /// <summary>
-       /// Gets the length of the specific curtain panel boundaries
-       /// </summary>
-      public double Length
-      {
-         get
-         {
-            double lengthVal = 0.0;
-            var enumCurveLoops = PanelBoundaries.GetEnumerator();
-            for (; enumCurveLoops.MoveNext();)
+        }
+
+        /// <summary>
+        /// Checks whether the specific curtain panel is rectangular. Returns 
+        /// true if the curtain panel is rectangular. Otherwise returns false
+        /// </summary>
+        public bool IsRectangular
+        {
+            get
             {
-               var crvArr = (CurveArray) enumCurveLoops.Current;
-               var enumCurves = crvArr.GetEnumerator();
-               for (; enumCurves.MoveNext();)
-               {
-                  var crv = (Autodesk.Revit.DB.Curve) enumCurves.Current;
-                  lengthVal += crv.Length;
-               }
+                var enumCurveLoops = PanelBoundaries.GetEnumerator();
+                int num = 0;
+                bool result = false;
+                for (; enumCurveLoops.MoveNext();)
+                {
+                    if (num > 0)
+                        return false;
+                    num++;
+                    var cLoop = new CurveLoop();
+                    var crvArr = (CurveArray)enumCurveLoops.Current;
+                    var enumCurves = crvArr.GetEnumerator();
+                    for (; enumCurves.MoveNext();)
+                    {
+                        var crv = (Autodesk.Revit.DB.Curve)enumCurves.Current;
+                        cLoop.Append(crv);
+                    }
+                    if (!cLoop.HasPlane())
+                        return false;
+                    result = cLoop.IsRectangular(cLoop.GetPlane());
+                }
+                return result;
             }
-            return lengthVal * UnitConverter.HostToDynamoFactor(SpecTypeId.Length);
-         }
-      }
-
-       /// <summary>
-       /// Checks whether the specific curtain panel is rectangular. Returns 
-       /// true if the curtain panel is rectangular. Otherwise returns false
-       /// </summary>
-      public bool IsRectangular
-      {
-         get
-         {
-            var enumCurveLoops = PanelBoundaries.GetEnumerator();
-            int num = 0;
-            bool result = false;
-            for (; enumCurveLoops.MoveNext();)
+        }
+        /// <summary>
+        /// Gets the width of the specific curtain panel, if it's rectangular
+        /// </summary>
+        public double Width
+        {
+            get
             {
-               if (num > 0)
-                  return false;
-               num++;
-               var cLoop = new CurveLoop();
-               var crvArr = (CurveArray) enumCurveLoops.Current;
-               var enumCurves = crvArr.GetEnumerator();
-               for (; enumCurves.MoveNext();)
-               {
-                  var crv = (Autodesk.Revit.DB.Curve) enumCurves.Current;
-                  cLoop.Append(crv);
-               }
-               if (!cLoop.HasPlane())
-                  return false;
-               result = cLoop.IsRectangular(cLoop.GetPlane());
+                var enumCurveLoops = PanelBoundaries.GetEnumerator();
+                int num = 0;
+                double result = 0.0;
+                for (; enumCurveLoops.MoveNext();)
+                {
+                    if (num > 0)
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
+                    num++;
+                    var cLoop = new CurveLoop();
+                    var crvArr = (CurveArray)enumCurveLoops.Current;
+                    var enumCurves = crvArr.GetEnumerator();
+                    for (; enumCurves.MoveNext();)
+                    {
+                        var crv = (Autodesk.Revit.DB.Curve)enumCurves.Current;
+                        cLoop.Append(crv);
+                    }
+                    if (!cLoop.HasPlane())
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
+                    if (!cLoop.IsRectangular(cLoop.GetPlane()))
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
+                    result = cLoop.GetRectangularWidth(cLoop.GetPlane());
+                }
+                return result * UnitConverter.HostToDynamoFactor(SpecTypeId.Length);
             }
-            return result;
-         }
-      }
-       /// <summary>
-      /// Gets the width of the specific curtain panel, if it's rectangular
-       /// </summary>
-      public double Width
-      {
-         get
-         {
-            var enumCurveLoops = PanelBoundaries.GetEnumerator();
-            int num = 0;
-            double result = 0.0;
-            for (; enumCurveLoops.MoveNext();)
+        }
+        /// <summary>
+        /// Gets the height of the specific curtain panel, if it's rectangular
+        /// </summary>
+        public double Height
+        {
+            get
             {
-               if (num > 0)
-                  throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
-               num++;
-               var cLoop = new CurveLoop();
-               var crvArr = (CurveArray) enumCurveLoops.Current;
-               var enumCurves = crvArr.GetEnumerator();
-               for (; enumCurves.MoveNext();)
-               {
-                  var crv = (Autodesk.Revit.DB.Curve) enumCurves.Current;
-                  cLoop.Append(crv);
-               }
-               if (!cLoop.HasPlane())
-                   throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
-               if (!cLoop.IsRectangular(cLoop.GetPlane()))
-                   throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
-               result = cLoop.GetRectangularWidth(cLoop.GetPlane());
+                var enumCurveLoops = PanelBoundaries.GetEnumerator();
+                int num = 0;
+                double result = 0.0;
+                for (; enumCurveLoops.MoveNext();)
+                {
+                    if (num > 0)
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
+                    num++;
+                    var cLoop = new CurveLoop();
+                    var crvArr = (CurveArray)enumCurveLoops.Current;
+                    var enumCurves = crvArr.GetEnumerator();
+                    for (; enumCurves.MoveNext();)
+                    {
+                        var crv = (Autodesk.Revit.DB.Curve)enumCurves.Current;
+                        cLoop.Append(crv);
+                    }
+                    if (!cLoop.HasPlane())
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
+                    if (!cLoop.IsRectangular(cLoop.GetPlane()))
+                        throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
+                    result = cLoop.GetRectangularHeight(cLoop.GetPlane());
+                }
+                return result * UnitConverter.HostToDynamoFactor(SpecTypeId.Length);
             }
-            return result * UnitConverter.HostToDynamoFactor(SpecTypeId.Length);
-         }
-      }
-       /// <summary>
-       /// Gets the height of the specific curtain panel, if it's rectangular
-       /// </summary>
-      public double Height
-      {
-         get
-         {
-            var enumCurveLoops = PanelBoundaries.GetEnumerator();
-            int num = 0;
-            double result = 0.0;
-            for (; enumCurveLoops.MoveNext();)
+        }
+
+        #endregion
+
+        #region Private constructors
+
+        /// <summary>
+        /// Create from an existing Revit Element
+        /// </summary>
+        /// <param name="panelElement"></param>
+        protected CurtainPanel(Autodesk.Revit.DB.Panel panelElement)
+        {
+            SafeInit(() => InitCurtainPanel(panelElement), true);
+        }
+
+        #endregion
+
+        #region Helper for private constructors
+
+        /// <summary>
+        /// Initialize a CurtainPanel element
+        /// </summary>
+        /// <param name="panelElement"></param>
+        private void InitCurtainPanel(Autodesk.Revit.DB.Panel panelElement)
+        {
+            InternalSetFamilyInstance(panelElement);
+            boundsCache = null;
+        }
+
+        #endregion
+
+        #region Static constructors
+
+        /// <summary>
+        ///get curtain panel from element  
+        /// </summary>
+        /// <param name="panelElement"></param>
+
+        internal static CurtainPanel ByElement(CurtainPanel panelElement)
+        {
+            var elementAsPanel = panelElement.InternalElement as Autodesk.Revit.DB.Panel;
+            if (elementAsPanel == null)
+                throw new Exception("Curtain Panel should represent Revit panel");
+            return new CurtainPanel(elementAsPanel);
+        }
+
+        /// <summary>
+        ///get all panels of curtain wall, system or slope glazing roof
+        /// </summary>
+        /// <param name="hostingElement"></param>
+        public static CurtainPanel[] ByElement(Element hostingElement)
+        {
+            CurtainGridSet thisSet = CurtainGrid.AllCurtainGrids(hostingElement.InternalElement);
+            var result = new List<CurtainPanel>();
+
+            var enumGrid = thisSet.GetEnumerator();
+            for (; enumGrid.MoveNext();)
             {
-               if (num > 0)
-                   throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
-               num++;
-               var cLoop = new CurveLoop();
-               var crvArr = (CurveArray) enumCurveLoops.Current;
-               var enumCurves = crvArr.GetEnumerator();
-               for (; enumCurves.MoveNext();)
-               {
-                  var crv = (Autodesk.Revit.DB.Curve) enumCurves.Current;
-                  cLoop.Append(crv);
-               }
-               if (!cLoop.HasPlane())
-                   throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
-               if (!cLoop.IsRectangular(cLoop.GetPlane()))
-                   throw new Exception(Properties.Resources.CurtainPanelIsNotRectangular);
-               result = cLoop.GetRectangularHeight(cLoop.GetPlane());
+                var grid = (Autodesk.Revit.DB.CurtainGrid)enumGrid.Current;
+                var ids = grid.GetPanelIds();
+                var idEnum = ids.GetEnumerator();
+                for (; idEnum.MoveNext();)
+                {
+                    var idPanel = idEnum.Current;
+                    var panel = DocumentManager.Instance.CurrentDBDocument.GetElement(idPanel);
+                    if (panel is Autodesk.Revit.DB.Panel)
+                    {
+                        result.Add(CurtainPanel.FromExisting(panel as Autodesk.Revit.DB.Panel, true));
+                    }
+                    else
+                    {
+                        result.Add(null);
+                    }
+                
+                }
             }
-            return result * UnitConverter.HostToDynamoFactor(SpecTypeId.Length);
-         }
-      }
-
-      #endregion
-
-      #region Private constructors
-
-      /// <summary>
-      /// Create from an existing Revit Element
-      /// </summary>
-      /// <param name="panelElement"></param>
-      protected CurtainPanel(Autodesk.Revit.DB.Panel panelElement)
-      {
-          SafeInit(() => InitCurtainPanel(panelElement), true);
-      }
-
-      #endregion
-
-      #region Helper for private constructors
-
-      /// <summary>
-      /// Initialize a CurtainPanel element
-      /// </summary>
-      /// <param name="panelElement"></param>
-      private void InitCurtainPanel(Autodesk.Revit.DB.Panel panelElement)
-      {
-          InternalSetFamilyInstance(panelElement);
-          boundsCache = null;
-      }
-
-      #endregion
-
-      #region Static constructors
-
-      /// <summary>
-      ///get curtain panel from element  
-      /// </summary>
-      /// <param name="panelElement"></param>
-
-      internal static CurtainPanel ByElement(CurtainPanel panelElement)
-      {
-         var elementAsPanel = panelElement.InternalElement as Autodesk.Revit.DB.Panel;
-         if (elementAsPanel == null)
-            throw new Exception("Curtain Panel should represent Revit panel");
-         return new CurtainPanel(elementAsPanel);
-      }
-
-      /// <summary>
-      ///get all panels of curtain wall, system or slope glazing roof
-      /// </summary>
-      /// <param name="hostingElement"></param>
-      public static CurtainPanel[] ByElement(Element hostingElement)
-      {
-         CurtainGridSet thisSet = CurtainGrid.AllCurtainGrids(hostingElement.InternalElement);
-         var result = new List<CurtainPanel>();
-
-         var enumGrid = thisSet.GetEnumerator();
-         for (; enumGrid.MoveNext(); )
-         {
-            var grid = (Autodesk.Revit.DB.CurtainGrid)enumGrid.Current;
-            var ids = grid.GetPanelIds();
-            var idEnum = ids.GetEnumerator();
-            for (; idEnum.MoveNext(); )
+            return result.ToArray();
+        }
+
+        /// <summary>
+        /// Construct this type from an existing Revit element.
+        /// </summary>
+        /// <param name="panel"></param>
+        /// <param name="isRevitOwned"></param>
+        /// <returns></returns>
+        internal static CurtainPanel FromExisting(Autodesk.Revit.DB.Panel panel, bool isRevitOwned)
+        {
+            if (panel == null)
             {
-               var idPanel = idEnum.Current;
-               var panel = DocumentManager.Instance.CurrentDBDocument.GetElement(idPanel);
-               result.Add(CurtainPanel.FromExisting(panel as Autodesk.Revit.DB.Panel, true));
+                throw new ArgumentNullException("panel");
             }
-         }
-         return result.ToArray();
-      }
-
-      /// <summary>
-      /// Construct this type from an existing Revit element.
-      /// </summary>
-      /// <param name="panel"></param>
-      /// <param name="isRevitOwned"></param>
-      /// <returns></returns>
-      internal static CurtainPanel FromExisting(Autodesk.Revit.DB.Panel panel, bool isRevitOwned)
-      {
-         if (panel == null)
-         {
-            throw new ArgumentNullException("panel");
-         }
-         
-         return new CurtainPanel(panel)
-         {
-            IsRevitOwned = true //making panels in Dynamo is not implemented
-         };
-      }
-
-      #endregion
-
-      #region public methods
-       /// <summary>
-       /// Gets Mullions hosting the specified curtain panel
-       /// </summary>
-       /// <returns></returns>
-      public Mullion[] SupportingMullions()
-      {
-         var elementAsPanel = InternalElement as Autodesk.Revit.DB.Panel;
-         if (elementAsPanel == null)
-            throw new Exception(Properties.Resources.CurtainPanelShouldRepresentRevitPanel);
-         var bounds = this.Boundaries;
-
-         var host = elementAsPanel.Host;
-
-         //var hostingGrid = CurtainGrid.ByElement(UnknownElement.FromExisting(host));
-
-         var mullions = Mullion.ByElement(UnknownElement.FromExisting(host, true));//hostingGrid.GetMullions();
-         int numberMullions = mullions.Length;
-         var result = new List<Mullion>();
-
-         for (int index = 0; index < numberMullions; index++)
-         {
-            var mullionAtIndex = mullions[index] as Mullion;
-            if (mullionAtIndex == null)
-               continue;
-
-            var thisCurve = mullionAtIndex.LocationCurve;
-
-            var enumBounds = bounds.GetEnumerator();
-            bool neighbor = false;
-            for (; enumBounds.MoveNext() && !neighbor; )
+
+            return new CurtainPanel(panel)
+            {
+                IsRevitOwned = true //making panels in Dynamo is not implemented
+            };
+        }
+
+        #endregion
+
+        #region public methods
+        /// <summary>
+        /// Gets Mullions hosting the specified curtain panel
+        /// </summary>
+        /// <returns></returns>
+        public Mullion[] SupportingMullions()
+        {
+            var elementAsPanel = InternalElement as Autodesk.Revit.DB.Panel;
+            if (elementAsPanel == null)
+                throw new Exception(Properties.Resources.CurtainPanelShouldRepresentRevitPanel);
+            var bounds = this.Boundaries;
+
+            var host = elementAsPanel.Host;
+
+            //var hostingGrid = CurtainGrid.ByElement(UnknownElement.FromExisting(host));
+
+            var mullions = Mullion.ByElement(UnknownElement.FromExisting(host, true));//hostingGrid.GetMullions();
+            int numberMullions = mullions.Length;
+            var result = new List<Mullion>();
+
+            for (int index = 0; index < numberMullions; index++)
             {
-               var polycrv = enumBounds.Current as PolyCurve;
-               if (polycrv == null)
-                  continue;
-               var bndCrvs = polycrv.Curves();
-               var enumCrv = bndCrvs.GetEnumerator();
-               for (; enumCrv.MoveNext(); )
-               {
-                  var crv = enumCrv.Current as Autodesk.DesignScript.Geometry.Curve;
-                  if (crv == null)
-                     continue;
-                  var midPoint = crv.PointAtParameter(0.5);
-                  if (midPoint.DistanceTo(thisCurve) < 1.0e-7)
-                  {
-                     neighbor = true;
-                     break;
-                  }
-               }
+                var mullionAtIndex = mullions[index] as Mullion;
+                if (mullionAtIndex == null)
+                    continue;
+
+                var thisCurve = mullionAtIndex.LocationCurve;
+
+                var enumBounds = bounds.GetEnumerator();
+                bool neighbor = false;
+                for (; enumBounds.MoveNext() && !neighbor;)
+                {
+                    var polycrv = enumBounds.Current as PolyCurve;
+                    if (polycrv == null)
+                        continue;
+                    var bndCrvs = polycrv.Curves();
+                    var enumCrv = bndCrvs.GetEnumerator();
+                    for (; enumCrv.MoveNext();)
+                    {
+                        var crv = enumCrv.Current as Autodesk.DesignScript.Geometry.Curve;
+                        if (crv == null)
+                            continue;
+                        var midPoint = crv.PointAtParameter(0.5);
+                        if (midPoint.DistanceTo(thisCurve) < 1.0e-7)
+                        {
+                            neighbor = true;
+                            break;
+                        }
+                    }
+                }
+                if (neighbor)
+                    result.Add(mullionAtIndex);
             }
-            if (neighbor)
-               result.Add(mullionAtIndex);
-         }
-         return result.ToArray();
-      }
-      /// <summary>
-      /// Gets family instance from curtain Panel
-      /// </summary>
-      /// <returns></returns>
-      public FamilyInstance AsFamilyInstance()
-      {
-         return FamilyInstance.FromExisting(InternalElement as Autodesk.Revit.DB.FamilyInstance, true);
-      }
-
-      public override string ToString()
-      {
-         return "Curtain Panel";
-      }
-
-      #endregion
-
-   }
+            return result.ToArray();
+        }
+        /// <summary>
+        /// Gets family instance from curtain Panel
+        /// </summary>
+        /// <returns></returns>
+        public FamilyInstance AsFamilyInstance()
+        {
+            return FamilyInstance.FromExisting(InternalElement as Autodesk.Revit.DB.FamilyInstance, true);
+        }
+
+        public override string ToString()
+        {
+            return "Curtain Panel";
+        }
+
+        #endregion
+
+    }
 }
\ No newline at end of file