Attempting to establish a direct relationship between 2D and 3D views resulted in an error.

[MYDJH]

"Hello, I'm trying to achieve a local implementation similar to the Cross-Probing example. I have imported a 3D view (.rvt) and a 2D drawing view (.dwg) into a .bim file using iTwin Snapshot. However, I encountered an error while establishing the relationship between the 2D and 3D views."
The error occurs at the point where the code is executed：

The error message：

"I'm not sure what's causing this issue. Could it be because of my merged model? If it's a model issue, how can I ensure I have the correct model? Any advice you have would be greatly appreciated."

[ColinKerr]

The PhysicalElementFulfillsFunction relationship is defined in the Functional schema.

Is this schema imported in your iModel? You can find out by seeing if the following query returns a schema with the name Functional:

SELECT * FROM ECDbMeta.ECSchemaDef

Schemas can be downloaded from npm, the functional schema package can be found here: https://www.npmjs.com/package/@bentley/functional-schema

That said it is possible that this relationship will not work for you because it requires that there be a functional element, the .dwg is likely to just get you drawing graphics. Notice how in the sample the queries join Physical <-> Functional <-> Drawing to make the connection.

    const elementMapQuery = `
    SELECT physToFunc.SourceECInstanceId as physElementId, drawToFunc.SourceECInstanceId as drawElementId, drawing.Model.Id as drawModelId
      FROM Functional.PhysicalElementFulfillsFunction physToFunc
      JOIN Functional.DrawingGraphicRepresentsFunctionalElement drawToFunc
        ON physToFunc.TargetECInstanceId = drawToFunc.TargetECInstanceId
      JOIN Bis.DrawingGraphic drawing
        ON drawToFunc.SourceECInstanceId = drawing.ECInstanceId`;

If you have functional elements or can create them, that is great and I suggest you add the extra fidelity to your iModel. If that is not possible, then you could directly connect your drawing and physical elements using the DrawingGraphicRepresentsElement relationship.

I hope this helps.

[MYDJH]

I really appreciate your advice.