# OBB error

**URL:** https://discourse.vtk.org/t/obb-error/9570
**Category:** Support
**Created:** [October 11, 2022, 3:11pm UTC](https://discourse.vtk.org/t/obb-error/9570 "2022-10-11T15:11:28Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![llobera](https://discourse.vtk.org/user_avatar/discourse.vtk.org/llobera/32/5540_2.png) [@llobera](https://discourse.vtk.org/u/llobera)
#### Post date: [October 11, 2022, 3:11pm UTC](https://discourse.vtk.org/t/obb-error/9570/1 "2022-10-11T15:11:28Z")

</div>

I created extracted the polydata (TIN) from a terrain I generated using a combination of `vtkDelaunay2D()` followed by `vtkWarpScalar()` and finally `GetPolyDataOutput()`

I then used the following lines:

> obbTree = vtkOBBTree()  
> obbTree.SetDataSet(TIN)  
> obbTree.BuildLocator()

but after I run the last instruction I get the following error/warning,

Generic Warning: In D:\bld\vtk\_1661287277002\work\Common\Core\vtkMath.cxx line 814  
vtkMath::Jacobi: Error extracting eigenfunctions

any help with this?