Exception Encountered in sparse_direct.cc [screen shot attached]

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RAUNAK

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Jun 7, 2018, 12:21:36 AM6/7/18

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While trying to solve linear elliptical PDE (1D) I encountered this exception. I have checked the assembly as suggested yet I am unable to understand what I might be missing. Any suggestions with this regard will be appreciated.

Daniel Arndt

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Jun 7, 2018, 12:47:52 PM6/7/18

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Raunak,

How did you check the assembly of your problem? Did you compute the entries for one or two cells by hand and compared with the one generated in your program?

If so, are the resulting matrices singular?

Best,

Daniel

Denis Davydov

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Jun 8, 2018, 1:37:59 AM6/8/18

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Hi Raunak,

Did you by any chance forgot to apply Dirichlet boundary conditions (this will influence your global matrix)?