On Wed, 26 Feb 2014 15:25:01 +0100 Heinz Zorn <[email protected]> wrote:
> Hello, > > even using LU as linear solver does not give the right solution. It > looks like the Dirichlet condition is set to zero at the borders of > the mesh partition. And how should we reproduce it? Jan > > Heinz > > Am 26.02.2014 15:05, schrieb Jan Blechta: > > Hi, > > > > I encountered crashes (segfaults or PETSc errors 76 or 77) when > > using hypre with OpenMPI 1.4.3 supplied with Ubuntu Precise. The > > recompilation of the whole stack of libraries with OpenMPI 1.6.5 > > solved the issue. > > > > Try switching to another preconditioner to check the hypothesis. > > > > Jan > > > > > > On Wed, 26 Feb 2014 12:15:35 +0100 > > Heinz Zorn <[email protected]> wrote: > > > >> Hello everybody, > >> > >> I have got a problem with the attached code when it is run in > >> parrallel using mpirun. The more processes I use, the more often it > >> crashes with the message: > >> > >> Traceback (most recent call last): > >> File "test.py", line 32, in <module> > >> solver.solve() > >> RuntimeError: > >> > >> *** > >> ------------------------------------------------------------------------- > >> *** DOLFIN encountered an error. If you are not able to resolve > >> this issue *** using the information listed below, you can ask for > >> help at *** > >> *** [email protected] > >> *** > >> *** Remember to include the error message listed below and, if > >> possible, *** include a *minimal* running example to reproduce the > >> error. *** > >> *** > >> ------------------------------------------------------------------------- > >> *** Error: Unable to successfully call PETSc function 'KSPSolve'. > >> *** Reason: PETSc error code is: 76. > >> *** Where: This error was encountered inside > >> /build/buildd/dolfin-1.3.0+dfsg/dolfin/la/PETScKrylovSolver.cpp. > >> *** Process: 11 > >> *** > >> *** DOLFIN version: 1.3.0 > >> *** Git changeset: unknown > >> *** > >> ------------------------------------------------------------------------- > >> Using only few processes the programm terminates properly, but the > >> results are obviously not correct. The installation is the ppa > >> installation on a compute server running ubuntu 13.10 server. It > >> seems that commenting out line 8 and using the Expression to define > >> the boundary condition solves the problem. > >> > >> Please tell me if any further information is needed or if I should > >> post this problem anywhere else. > >> > >> Thanks in advance, > >> Heinz Zorn > >> > > _______________________________________________ fenics mailing list [email protected] http://fenicsproject.org/mailman/listinfo/fenics
