RevitiAPI: CrossFitting creation problem – InvalidOperationException: failed to insert cross.

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By Aaron Lu

I was asked a problem about create Cross Fitting,

I remember that the cross fitting creation method Document.Create.NewCrossFitting needs 4 connectors as arguments, the order of those connectors is not arbitrary, as Jeremy said in this post http://thebuildingcoder.typepad.com/blog/2014/10/newcrossfitting-connection-order.html, it should be main-main-side-side rather than main-side-main-side.

But when I got the file and test it, it always throws InvalidOperationException: failed to insert cross, no matter what order I tried.

Autodesk.Revit.Exceptions.InvalidOperationException: failed to insert cross.

It is wired. But fortunately I found the cause: the Routing Preference is not set for Cross.

After setting it, the problem has gone!

Pick the pipe > Edit type > Routing Preferences > Cross > select "All"

as below: