Internal error when creating columns stirrup rebars

REDO10 — Tue, 16 Sep 2025 13:26:33 GMT

Hi All, @kumara_teja @longt61 @naveen_kumar_t

I’m using Dynamo inside Revit 2023 and I'm attempting to create stirrup rebars for the columns shown in the image below. However, I received an internal error message, and I’m not sure what caused it. Could it be related to a RebarHookOrientation issue when the column is transformed?

As I descibed in the image below, I tick “Include hooks in Rebar Shape definition”,...are my settings correct?

Please check my attached code:

import clr import sys import System from System.Collections.Generic import IList, List clr.AddReference('ProtoGeometry') from Autodesk.DesignScript.Geometry import * clr.AddReference('RevitAPI') from Autodesk.Revit.DB import * from Autodesk.Revit.DB.Structure import StructuralType, RebarBarType, RebarShape, RebarHookType,Rebar, RebarHookOrientation, RebarStyle, RebarCoverType clr.AddReference('RevitNodes') import Revit clr.ImportExtensions(Revit.GeometryConversion) clr.AddReference('RevitServices') from RevitServices.Persistence import DocumentManager from RevitServices.Transactions import TransactionManager doc = DocumentManager.Instance.CurrentDBDocument # get covers parameters by face cover_faces = { "Top": BuiltInParameter.CLEAR_COVER_TOP, "Bottom": BuiltInParameter.CLEAR_COVER_BOTTOM, "Other": BuiltInParameter.CLEAR_COVER_OTHER } cover_types = list(FilteredElementCollector(doc).OfClass(RebarCoverType).ToElements()) # get existing covers type def get_cover_type(distance): for ct in cover_types: if abs(ct.CoverDistance - distance) < 1e-6: return ct name = "Enrobage_{} cm".format(distance / 0.0328084) new_ct = RebarCoverType.Create(doc, name, distance) cover_types.append(new_ct) return new_ct # set covers distance from user input def set_column_covers(column, top, btm, side): # Convert cm → feet cover_cm = {"Top": top, "Bottom": btm, "Other": side} cover_ft = {face: cover_cm[face] * 0.0328084 for face in cover_cm} # Assign covers for face, bip in cover_faces.items(): param = column.get_Parameter(bip) if param and param.StorageType == StorageType.ElementId: ct = get_cover_type(cover_ft[face]) if ct: param.Set(ct.Id) # get updated covers from user input def get_column_covers(column): result = {} for face, bip in cover_faces.items(): param = column.get_Parameter(bip) if param and param.StorageType == StorageType.ElementId: ct = doc.GetElement(param.AsElementId()) if isinstance(ct, RebarCoverType): result[face] = ct.CoverDistance return result # get solid geometry from column def get_solid(column): options = Options() options.IncludeNonVisibleObjects = False options.DetailLevel = ViewDetailLevel.Fine geoElement = column.get_Geometry(options) for g in geoElement: if isinstance(g, GeometryInstance): inst_geo = g.GetInstanceGeometry() return next((g for g in inst_geo if isinstance(g, Solid) and g.Volume > 0), None) # define stirrups curves for the column def stirrup_curves(column, solid, covers): curves = [] side_cover = covers.get("Other") btm_cover = covers.get("Bottom") base_face = next((f for f in solid.Faces if f.FaceNormal.IsAlmostEqualTo(XYZ.BasisZ.Negate())), None) norm = base_face.FaceNormal curveloop = base_face.GetEdgesAsCurveLoops()[0] curveloop1 = CurveLoop.CreateViaOffset(curveloop, side_cover, norm.Negate()) trans = Transform.CreateTranslation(XYZ.BasisZ.Multiply(btm_cover)) curveloop1 = CurveLoop.CreateViaTransform(curveloop1, trans) for c in curveloop1: curves.append(c) return curves columns = list(FilteredElementCollector(doc)\ .OfCategory(BuiltInCategory.OST_StructuralColumns)\ .WhereElementIsNotElementType()\ .ToElements()) offset_curves = [] with Transaction(doc, "Set columns Covers") as t: t.Start() for c in columns: set_column_covers(c, 4.5, 6, 3.5) t.Commit() rebar_types = (FilteredElementCollector(doc) .OfCategory(BuiltInCategory.OST_Rebar) .WhereElementIsElementType() .WherePasses(ElementClassFilter(RebarBarType)) .ToElements()) rebar_shapes = (FilteredElementCollector(doc) .OfCategory(BuiltInCategory.OST_Rebar) .WhereElementIsElementType() .WherePasses(ElementClassFilter(RebarShape)) .ToElements()) #shape_00 = next((s for s in rebar_shapes if s.Name == "00"), None) bar_type = next((r for r in rebar_types if r.LookupParameter('Diamètre de barre').AsValueString() == "12 mm"), None) bar_type1 = next((r for r in rebar_types if r.LookupParameter('Diamètre de barre').AsValueString() == "6 mm"), None) hook_types = FilteredElementCollector(doc) \ .OfCategory(BuiltInCategory.OST_Rebar) \ .WhereElementIsElementType() \ .WherePasses(ElementClassFilter(RebarHookType)) \ .ToElements() hook_90 = next((h for h in hook_types if Element.Name.GetValue(h) == "Standard - 90 deg"), None) hook_135 = next((h for h in hook_types if Element.Name.GetValue(h) == "Standard - 135 deg"), None) with Transaction(doc, "create stirrups") as t: t.Start() for col in columns: solid = get_solid(col) covers = get_column_covers(col) top_cover, btm_cover, side_cover = covers["Top"], covers["Bottom"], covers["Other"] curvs = stirrup_curves(col, solid, covers) L = col.LookupParameter('Longueur').AsDouble() s = 0.15 * 0.3048 d = L - top_cover - btm_cover stirup_curves = List[Curve](curvs) rebar = Rebar.CreateFromCurves( doc, RebarStyle.StirrupTie, bar_type1, hook_135, hook_135, col, XYZ.BasisZ, curvs, RebarHookOrientation.Left, RebarHookOrientation.Left, True, True ) rebar.GetShapeDrivenAccessor().SetLayoutAsMaximumSpacing(s, d, True, True, True) t.Commit() OUT = 0

Please check my attached model file below:

Any help would be appreciated.

Thanks.

Re: Internal error when creating columns stirrup rebars

REDO10 — Fri, 19 Sep 2025 09:02:49 GMT

Can anyone help me please?

topic Internal error when creating columns stirrup rebars in Revit API Forum

Internal error when creating columns stirrup rebars

Re: Internal error when creating columns stirrup rebars