IFC import/export

[Anonymous]

Hello,

I am trying to export an IFC from a very simple model (for testing purpose) from Revit 2017. I want to test what is exported exactly in order to use it maybe for energy analysis outside of Revit. So I export an IFC 2x3 Coordination View 2.0, which seems to go well. It gives me a 6kb IFC file. Then I try to simply reimport in within Revit, and there, I got nothing. No error message, but it's like the IFC is empty...

I am not expert in the IFC formats, but from what I've read, the Coordination View 2.0 should at least contain the walls, roofs, etc.

So, what am I missing?

Attached is my rvt file used for export. It's just 2 small rooms.

I am able to open IFC files found on the web though..

Thanks a lot for any help,

Arnaud.

PS: Furthermore, I have download and installed the Autodesk app for IFC export. Doesn't seem to change anything.

[baniabdelwaheb1]

Hi Cenaero,

Open the IFC file in a text editor 

And save it as .TXT with  ITF-8 encoding option.

Hope that helps,

Regards,

Abdelwaheb BANI

[Anonymous]

Hello,

Thanks for the answer. I tried this. I guess you mean UTF-8 ?

I did that, and saved as ".ifc" (if I save as ".txt" I can't see it when I'im in the import IFC window of Revit). I still got nothing..

Attached is my ifc file. I zipped it because apparently this forum doesn't accept ".ifc" files as attachment (seriously..?).

Thanks,

Arnaud.

[ryan]

I saw, from the text file you were using QuantityTakeOffAddOnView, can you do just the default IFC2x3 Coordination View 2.0?  Not sure that will solve your issue.

FILE_DESCRIPTION(('ViewDefinition [CoordinationView_V2.0, QuantityTakeOffAddOnView]'),'2;1');

Also if you use 'export only element visible in view' and if the current view has nothing in it, nothing will be exported.

[ryan]

@Anonymous, I'm actually curious, what option, in the IFC Export UI, did you check to get the 'Quanity Take off view'?

Because I don't see that in my UI (Alternate UI 16.6.6.0.0)

Thanks.

[Anonymous]

Hello,

Thank you for your suggestion. I re-did the export, using the "classic" Coordination View 2.0, which shouldn't be limited to elements visible in view (but I made sure to export from a 3D view where all elements were visible). I still have the same problem.

[ryan]

I could help you, but don't have 2017.

[Anonymous]

@ryanI'm not sure anymore, but I think I used "In-session setup", and then checked the "Export base quantities" checkbox. Or one of these checkboxes 😉

[Anonymous · Accepted solution]

Hi,

I found what was wrong. By default, in the IFC export Classes options, walls are... not exported instead of being exported to ifcWall. I find that quite surprising, but.. yeah.

[ryan]

Cool... If curious, I've used Jon Mirtsch's import class map before. https://github.com/jmirtsch/RevitIfcImportClassMap