Steel design in RSA2025 with API in Dynamo

[230826]

Hello evereyone!

I am trying to write code that will be responsible for setting the parameters needed to check SLS and ULS. Using API 2025, I did not find the appropriate ****tions to invoke the parameters I need. It seems that the API is not complete (available only from version 3.5). I found sample codes on the Internet that allowed me to set the parameters I needed, but none of them worked. Using python and C#, I always got an error. Have any of you had a similar problem and would be able to help me with it?

using RobotOM;

IRobotLabel rLabel;
IRDimMembDefData rdimLabelData;
IRDimMembParamsCM66 rDimMembParams;

RobotApplicationClass app = new RobotApplicationClass();

rLabel = app.Project.Structure.Labels.Create(IRobotLabelType.I_LT_MEMBER_TYPE, "My Label");
rdimLabelData = (IRDimMembDefData) rLabel.Data;
rDimMembParams = (IRDimMembParamsCM66) rdimLabelData.CodeParams;

rDimMembParams.BuckLenghtCoeffY = 10;
rdimLabelData.CodeParams = rDimMembParams;

app.Project.Structure.Labels.Store(rLabel);

win32-x64\.debugger\x86_64\vsdbg.exe' '--interpreter=vscode' 'connection=8d7050243c4c4b068fd3be8c045b68b3'
Unhandled exception. System.InvalidCastException: Unable to cast COM object of type 'System.__ComObject' to interface type 'RobotOM.IRDimMembParamsCM66'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{34C1F17A-9D20-4775-B57A-B154A033C1FA}' failed due to the following error: Such an interface is not supported. (0x80004002 (E_NOINTERFACE)).

import clr
import sys
from System import Environment
from System import Object

user = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)
clr.AddReference(user + r"\Dynamo\Dynamo Revit\3.2\packages\Structural Analysis for Dynamo\bin\interop.RobotOM.dll")
clr.AddReference('ProtoGeometry')

from Autodesk.DesignScript.Geometry import *
from RobotOM import *

app = RobotApplicationClass()

r_label = IRobotLabel 
print(type(r_label))
r_label = app.Project.Structure.Labels.Create(IRobotLabelType.I_LT_MEMBER_TYPE, "My Label") 

rdim_label_data = IRDimMembDefData
rdim_label_data = r_label.Data

r_dim_memb_params = IRDimMembParamsEC3
r_dim_memb_params = rdim_label_data.CodeParams

r_dim_memb_params.BucklingDiagramY = IRDimBuckDiagramEC3.I_DBD_EC3_TRUSS_DIAGONAL_0_8
rdim_label_data.CodeParams = r_dim_memb_params

print("Etykieta została utworzona i zapisana.")

 

I am the most interesting to use it in python, because i want to do this script in Dynamo

Best Regards!

[Stephane.kapetanovic · Accepted solution]

hi @230826 

First of all, if you haven’t already done so, you need to assign the code corresponding to the IRDimMembParamsCM66 cast in the preferences.

IRobotApplication RobApp = new RobotApplication();
RobApp.Project.Preferences.SetActiveCode(I_CT_STEEL_STRUCTURES, "CM66");

 then your code will work 

RobotLabelServer Labels = RobApp.Project.Structure.Labels;
IRobotLabel Label = Labels.Create(I_LT_MEMBER_TYPE, "My Label");
IRDimMembDefData LabelData = (IRDimMembDefData)Label.Data;

IRDimMembParamsCM66 MembParams = (IRDimMembParamsCM66)LabelData.CodeParams;
MembParams.BuckLenghtCoeffY = 10;

LabelData.CodeParams = MembParams;
Labels.Store(Label);

Best Regards