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<div>Hi,</div>
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<div>I want to use the AttractorAnisoCurve field to refine a mesh selectively near the upper edge of a cylinder, see attached example. When I run 1D meshing, I get many errors saying</div>
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<div>Error: U(1,1)=0 in matrix in place inversion</div>
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<div>In 2D meshing, the same messages come up again. In 3D, gmsh closes.</div>
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<div>Why is this, what do I do wrong, and how to fix it?</div>
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<div>gmsh version is 2.8.0 64bit on Windows 7.</div>
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<div>Thank you,</div>
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<div>Matthias</div>
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