SolidUtils.IntersectSolidWithCurve cutGCurveWithGeometry Exception

[MattKincaid]

Sometimes when calling IntersectSolidWithCurve we'll see an error like the one below.

Autodesk.Revit.Exceptions.InternalException
HResult=0x80131500
Message=Error from cutGCurveWithGeometry
Source=RevitAPI
StackTrace:
at Autodesk.Revit.DB.SolidUtils.IntersectSolidWithCurve(Solid solid, Curve curve, SolidCurveIntersectionOptions options)

Does anyone know why this happens? Any workarounds?   I can't find it in the documentation.  It seems to happen most commonly when the curve is nearly coincident with the solid's exterior.

Thanks!

[jeremytammik]

If you can submit a minimal reproducible case, I'll share that with the development team for analysis:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#1b

Afaik, internal exceptions should not leak out into the public API.

[MattKincaid · Accepted solution]

Thanks @jeremytammik .  I think I actually discovered the problem.  The solids I was generating to pass into IntersectSolidWithCurve were just degenerate in certain cases.  The solid is created by unioning multiple solids using the BooleanOperationUtils class, but in some cases I was unioning solids when it didn't make sense geometrically.

I refactored my code to make better solids and no more error. Do you think the development team would still want to take a look?  I don't have a good way to provide source code, but I could provide an installer and a sample model.  You could easily decompile.  Let me know if that'd be helpful.

Thanks

[jeremytammik]

Dear Matt,

Congratulations on solving the issue and thank you for your appreciation and letting us know.

I think they have more than enough other stuff to keep them well occupied, thank you  🙂

Cheers,

Jeremy

[DanielNgai]

Hi,

Why i cannot find your class (SolidUtils.IntersectSolidWithCurve()) in Revit API?

Thanks

[MattKincaid]

@DanielNgai I don't believe the SolidUtils.IntersectSolidWithCurve() method is in the public API. If memory serves, this InternalException was generated by calling the public API method, Solid.IntersectWithCurve() , and passing a solid with degenerate geometry.

My guess is the public API method calls an internal method, which then generated the exception.  But that's only a guess.  One way to work around the issue is to add a Try Catch, and simply catch the InternalException when it occurs (seems to be rare).

Cheers!