Unable to export IFC file from Revit 2022.1

[CristvaoIken1137]

Hello,

I need some help with the following subject.

When exporting a Revit project to IFC it shows the error message: "There has been an unrecoverable error during export...".

In this specific case, I have two separate files each with a very similar building. I was able to export one of them to IFC resulting in a file a little over 1Gb (with previous versions of Revit, the same building and LOD, the IFC file size output was around 400Mb!). With the other project, I'm not able at all to export despite the tweeking with the export options.

I realize it's a known issue, apparently resolved in Revit 2023, but we have no interest in installing that version for now and there has to be a way to export files to IFC in Revit 2022.1.

Any suggestions?

Thank you!

[ToanDN]

Did you try the suggestion?

[PrathapSekar]

This would help you, as it did for us. Check the below link,

https://knowledge.autodesk.com/support/revit/troubleshooting/caas/sfdcarticles/sfdcarticles/Revit-sh...

We also used Course/Medium/Fine detail level of views too to export the large files but that did not work, later we split our files to export the IFC file. You may try to change the view detail level.

[CristvaoIken1137]

Hi ToanDN,

Yes i tried. Didn't work.

[CristvaoIken1137]

Hi PrathapSekar,

Thank you for the suggestion.
I went down that route too, reducing the level of detail, hiding unnecessary geometry, didn't work too.

[PrathapSekar]

Tried splitting the file?

lowering the Revit file size may help you!

[nathaniel.mcmahon]

I've been working with large IFC file exports on a project recently. Things are smooth now but initially not so. It's a bit of a dark art. You'll have to watch the export process and see the model element id's that cause the export to hang. There may be many, find the one that crashes it and review this element. OFten IFC exporter has issues with converting certain types of geometry that are not IFC native. Something that takes revit 2 lines of code may need to be represented in a dumbed down brep or such with 8 lines of code. Sometimes revit doens't know how to figure out these conversions and hangs. I've found minute curve profiles and families with overlapping geometries are the main culprits. It still takes ~45min to process a 1gb revit file. but that's better than 12 hours and a crash. At one point it was 10 mins. The following checkboxes help with the export of difficult geometry. I had remodeled all profiles in families so there is a simpler medium level detail for the IFC export. But it seems revit won't export the medium geometry and will only export fine no matter the view or export settings.