Revit 2023(.1) no longer recognizes IfcExportAs and IfcExportType

[DKMARO]

Hi all,

We've recently started projects in Revit 2023.1, and during a QA session yesterday using IFC's in Solibri, I found out that none of the objects registers the values we assign in the traditional "IfcExportAs"- and "IfcExportType"-parameters.

I know that Autodesk probably wanted to ease the use of costumization/overriding of the IFC Type and Predefined Type properties, but by introducing the built in "Export Type to IFC As"- and "Type IFC Predefined Type"-parameters, they somehow broke the traditional export parameters.

We have several clients that have quite strict IFC-specifications, which is why we run the setting og these parameters with automated workflows. With the new introduction of Autodesks export parameters, we have to manually go through our models, and set the parameters for pretty much all object types...

I've attached three screenshots of an Ifc export of a dishwasher from the RAC_sample project. 

IfcTest_1: Vanilla export with no parameters set.

IfcTest_2: Export where "IfcExportAs" = IfcElectricApplianceType, and "IfcExportType" = DISHWASHER

IfcTest_3: Export where I through the UI set the new built in parameters with same values as above. 

Has anyone else noticed this? And does anyone have a solution to this? 🙂

PS: I've attached three screenshotsed on 2x3 export. I have not tested this with IFC4.

[lamvu.ngohung]

Hi,
I experienced the same problem, the "IfcExportAs" is not working any more. The parameter is replaced by the built-in "IFC Predefined Type".
However, if I use the old parameter "IfcObjectType", the value will override ifc parameter "ObjectTypeOverride"
I attached 3 cases for more understanding.

[L.Maas]

Have a look a THIS page.

I probably would write a simple Dynamo script to copy the values from the old parameters to the new ones

[DKMARO]

Hi @L.Maas,

Cheers for the answer.

As I also wrote on the Github issue,  I was a bit too quick to assume, that these parameters needed to be set via the UI.

I ended up moving the values from the old parameters to the new ones via Dynamo.

[daniel_erhart_ARK]

Hi, but the problem arises if you need to insert these parameters into Revit LT. Revit LT does not have the new parameters integrated, so the only option is to create the IfcExportAs parameter, but it does not work. Does this mean Revit LT users are out of luck and no longer export anything to IFC?

Daniel E.

[bobX2VAF]

Hi @daniel_erhart_ARK, I'm experiencing the same issue here with Revit 2023 LT IfcExportAs not working as intended anymore... Did you find a workaround? or even better, a solution...?