# vtkMath::Jacobi: Error extracting eigenfunctions using vtkAbstractPicker

**URL:** https://discourse.vtk.org/t/vtkmath-error-extracting-eigenfunctions-using-vtkabstractpicker/1013
**Category:** Support
**Created:** [May 23, 2019, 3:30pm UTC](https://discourse.vtk.org/t/vtkmath-error-extracting-eigenfunctions-using-vtkabstractpicker/1013 "2019-05-23T15:30:39Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![msmerps](https://discourse.vtk.org/user_avatar/discourse.vtk.org/msmerps/32/1559_2.png) [@msmerps](https://discourse.vtk.org/u/msmerps)
#### Post date: [May 23, 2019, 3:30pm UTC](https://discourse.vtk.org/t/vtkmath-error-extracting-eigenfunctions-using-vtkabstractpicker/1013/1 "2019-05-23T15:30:39Z")

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Hi again,  
I’m hitting a strange problem using vtkAbstractPicker. Specifically, when I initially load my render window and try to use the Pick method of a vtkAbstractPicker to get the 3D coordinates corresponding to a mouse click, I get this exception:

vtkMath::Jacobi: Error extracting eigenfunctions

However, the error only happens for the first click. Moreover, if I remove the renderers attached to the render window and replace them with new ones, I don’t get the error. The error seems to be specific to the first click in the render window.

Any ideas as to what’s going wrong? I get the error in both VTK 8.1 and 8.2.  
-M

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<div class="post-metadata">

### Author: ![msmerps](https://discourse.vtk.org/user_avatar/discourse.vtk.org/msmerps/32/1559_2.png) [@msmerps](https://discourse.vtk.org/u/msmerps)
#### Post date: [May 27, 2019, 7:45pm UTC](https://discourse.vtk.org/t/vtkmath-error-extracting-eigenfunctions-using-vtkabstractpicker/1013/2 "2019-05-27T19:45:28Z")

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I figured out the problem. I was trying to plot items outside of the limits of the image viewer. Oops.