Pragalv,
I've tried to run step-36 on my workstation and it works just fine. Are
you running in parallel? You might also want to try a different version
of PETSc/SLEPc -- I am using 3.7.4/3.7.3 for the two.
I also tried to find out what error 76 actually means. I *think* that it
is this error defined in include/petscerror.h:
#define PETSC_ERR_LIB 76 /* error in library called by PETSc */
This error code is, unfortunately, widely used. Here's the part of the
error message that gives more information:
> [0]PETSC ERROR: Error in external library
>
> [0]PETSC ERROR: Error in LAPACK subroutine steqr: info=0
This is not particularly useful. I've tried to find where that error
message is generated in PETSc or SLEPc, but am unable to find the
location -- maybe that was only added in versions between my 3.7.x and
your 3.10.x. You might want to look into this -- but generally, all it
means that the LAPACK function steqr has returned an error, and you
still have to find out why that happened...
I know that's not what you were looking for, but that's the best I can
suggest for the moment. Since the program works for me, I can't really
debug it. But it provides you an avenue: Try a different machine and/or
a different PETSc/SLEPc version and see whether that makes a difference
for you!
Best
W.
--
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Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
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