Hi Dmitry ,
We already had the same problem.
We understood that it is due to some "DUNE_THROW" commands.
Our solution (probably not the best) was to remove several "DUNE_THROW"
commands and to replace them with a simple std::cout to keep the
information that something is wrong.
Regards
Etienne
Le 29/06/2022 à 19:36, Dmitry Pavlov a écrit :
Hello,
In one porous flow simulation, I get this message:
Newton iteration 6 done, residual = 3.1654e+13
Solve: M deltax^k = rNewton: Caught exception: "FMatrixError
[luDecomposition:/home/dpavlov/DUMUX/dune-common/dune/common/densematrix.hh:939]:
matrix is singular"
... and it is fine. Matrix can be singular, no objection here. After
this, the Newton solver reports that it did not converge and restarts
with a smaller time step, and eventually it proceeds.
However, when I run the same simulation with MPI, I get this
Newton iteration 8 done, residual = 7.2437e+13
Solve: M deltax^k =
and the program hangs.
So it seems that it misses the singularity in the MPI mode and tries
to proceed with the current time step, to no avail.
How this can be cured?
Best regards,
Dmitry
_______________________________________________
DuMux mailing list
[email protected]
https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
_______________________________________________
DuMux mailing list
[email protected]
https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
