topic Re: Cannot create point loads in Revit 2024 in Revit API Forum

Cannot create point loads in Revit 2024

junlin001 — Sun, 23 Apr 2023 12:43:30 GMT

1. The example to create point load in Revit 2024 API (structure) does not compile

public void CreatePointLoad(Document document)
{
// Define the location at which the PointLoad is applied. XYZ point = new XYZ(0, 0, 4);
// Define the 3d force. XYZ force = new XYZ(0, 0, -1);
// Define the 3d moment. XYZ moment = new XYZ(0, 0, 0);

PointLoad pointLoad = PointLoad.Create(document, point, force, moment, null, null);
}

2. Then I tried to first create a host, then assign a load to the host
FamilyInstance instance = _document.Create.NewFamilyInstance(curve, symbol, levelBase, structuralType);
bool isValid = PointLoad.IsValidHostId(_document, elementId);
pointLoad = PointLoad.Create(_document,instance.Id, xyz, xyzForce, xyzMoment, null);
I got error "hostElemId is not permitted to host this type of load".
Can someone show me how I can create a point load the correct way?

Re: Cannot create point loads in Revit 2024

moturi.magati.george — Mon, 24 Apr 2023 06:32:15 GMT

Hi @junlin001,

I have reproduced the issue and raised it with the development team here.
I will update once they respond.

Thank you

Re: Cannot create point loads in Revit 2024

moturi.magati.george — Mon, 24 Apr 2023 12:45:33 GMT

Hello @junlin001,

I received a response from the development team.

Starting with Revit 2024 you can create only hosted loads. This is the reason why for this method you get an error: PointLoad pointLoad = PointLoad.Create(document, point, force, moment, null, null).

For the second case, where you pass host element id: accepted hosts are analytical members or analytical panels elements (this is the reason you get the error saying that "host is not permitted")

Re: Cannot create point loads in Revit 2024

junlin001 — Mon, 24 Apr 2023 13:47:22 GMT

Thank you, Moturi. Can you provide a simple example in c# or VB.NET here?

Re: Cannot create point loads in Revit 2024

RPTHOMAS108 — Mon, 24 Apr 2023 15:33:18 GMT

The example you are looking for is already in the RevitAPI.chm under PointLoad.Create, when you use that you should pick an analytical element not a physical one (such as FamilyInstance).

Re: Cannot create point loads in Revit 2024

junlin001 — Tue, 25 Apr 2023 12:42:00 GMT

This is the document I can find: https://help.autodesk.com/view/RVT/2024/ENU/?guid=Revit_API_Revit_API_Developers_Guide_Discipline_Specific_Functionality_Structural_Engineering_Loads_html

The code sample there does not work for me.

Where can I download RevitAPI.chm? I cannot find the file under the installation folder (C:\Program Files\Autodesk).

Re: Cannot create point loads in Revit 2024

pierre — Thu, 27 Apr 2023 01:43:01 GMT

Thank you, however the only example I found in the PointLoad class in the RevitAPI.chm was: Getinfo_PointLoad(PointLoad pointLoad) which does not illustrate the Create method. Any chance you could post the sample you were referring to?

Re: Cannot create point loads in Revit 2024

junlin001 — Mon, 01 May 2023 01:06:52 GMT

I was finally able to create a point load by

1. First create an AnalyticalMember and pass its elementId in the following
2. use PointLoad.Create(_document, elementId, xyz, xyzForce, xyzMoment, null);