How do you use this with an IFC file?

```
String fileName = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "AC14-FZK-Haus.ifc");

AssimpContext importer = new AssimpContext();

m_model = importer.ImportFile(fileName, PostProcessSteps.None);
```

Gives me this error:

Assimp.AssimpException: 'Error importing file: The string ",0.,0.))" cannot be converted into a value.'

Cannot find any examples on how to use assimp-net with ifc files... :/

Start with the shown AssimpContext.ImportFile call and the AC14-FZK-Haus.ifc input. Reproduce the reported conversion error and investigate how IFC files are handled by this entry point. Done means identifying a supported way to import the file or documenting a confirmed limitation and actionable next step.

Written by the indexing model from the issue text.