Some model missing when in customer export(IExportContext) Revit models.

[Anonymous]

Hi,

As title, I developed an addin application exporting Revit models, and I have implemented the interface IExportContext to export models, but find that in some cases, some small models are missing when in a large scene. And when I export these small models separately, these models can be read and export successfully.  This problem is a low probability issue, but I still want to ask if anybody faced the same issue or can give a advise.

Thanks a lot.

Also, I found that somebody also met the model missing problem, not know if it is the same problem.

https://forums.autodesk.com/t5/revit-architecture-forum/export-to-dwg-small-objects-missing/td-p/738...

[jeremytammik]

As far as I can tell, the workarounds discussed in the thread that you point to say it all.

Have you tried applying them?

The custom export just exports what is rendered in Revit.

I can imaging that if an object is too small to be seen, it may be omitted. In that case, if you need the export for a non-visual purpose and care about invisible objects, you may have to add some functionality to ensure it is included.

Cheers,

Jeremy

[jeremytammik]

I asked the development team about this too, and they say:

Well, the answers in the referred-to thread do not surprise me. IExportContext deals with graphical export, so it is to be expected that small objects might be optimised out.

I think this is by design. There might be different provisions for different types of small objects, but, as a general rule, both print and export can miss them due to how the processing pipeline works. There have been many discussions regarding how this limitation could be removed. A solution will involve a performance penalty and possibly some new UI.

I hope this clarifies.

Best regards,

Jeremy