[vtkusers] error when using vtkMeshQuality filter

[Thompson, David C]

> I need some help with the vtkMeshQuality filter.  My
> task is to convert nodal values to cell centered values,
> then convert to a tetrahedral mesh and get the volume
> of the each cell.  I am using the vtkMeshQuality filter.
> I keep getting "Unable to factor linear system".  Any ideas??
Hmmm. The only place that error message occurs is in
vtkMath::LUFactorLinearSystem, which vtkMeshQuality does not
call. Are you using vtkQuadricDecimation anywhere? It calls
that vtkMath routine. If not, perhaps you have done a partial
rebuild of VTK and the entry points in a library have changed
so that vtkMeshQuality is calling the wrong piece of code? If
you can run your code from the debugger and insert a breakpoint
right before the "Unable to factor linear system" message is
printed, having the call stack at that point would really help.

        David
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