GetInstanceCutoutFromWall Problem

[Anonymous]

I find that the ExporterIFCUtils.GetInstanceCutoutFromWall is a fine way to get the outer CurveLoop of a window or a door, but sometimes it does for some strange reason not work, and no helpful error message is supplied.

I have attached

• a simple test project including only one wall containing two windows
• a sample code that demonstrates the problem.

Now my hope is, that someone is able to explain why the GetInstanceCutoutFromWall works on one window but not on the other?

Regards

Jan Grenov

[Anonymous · Accepted solution]

Now I have determined when the error occurs!

It happens whenever an opening family (door or window ) is defined without and openingcut.

Openings must have an OpeningCut object. If not the GetInstanceCutoutFromWall will fail!

Regards

Jan Grenov

[jeremytammik]

Dear Jan,

Thank you for very much raising, solving and sharing the solution for this issue.

This sounds like a nice, clear, succinct snippet of information that I will be glad to summarise and publish on The Building Coder as well for future reference.

Cheers,

Jeremy

[Revitalizer]

Hi Jeremy,

would be useful to add this to the RevitAPI.chm, as well.

Rudi

[jeremytammik]

Dear Rudi,

Thank you for the suggestion. 

I'll see what i can do...

Cheers,

Jeremy

[jeremytammik]

Thank you again, Jan, for pointing this out!

Saved here for posterity and future reference:

http://thebuildingcoder.typepad.com/blog/2017/06/copy-local-false-and-ifc-utils-for-wall-openings.ht...

Cheers,

Jeremy

[Anonymous]

Glad to be of assistance.