[petsc-users] How to understand these error messages

[Jed Brown]

Fande Kong <fd.kong at siat.ac.cn> writes:

> These messages come from MatStashScatterGetMesg_Private() line 632 in
> /src/mat/utilsmatstash.c. I do not send values. I just try to
> use MatAssemblyEnd/begin() to assembly stiffness matrix.

It is most likely memory corruption caused by something earlier.  Is it
reproducible?  (It looks like you're running at fairly large scale.)  I
wonder if something earlier misuses 32- versus 64-bit ints.
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