Hi, I am experimenting with GAMG by changing some of its parameters. I tried to set the GAMG type into "agg" using : PCGAMGSetType(pc,"agg");
and I get the following error : ========================================================================== Solving linear system of size 108972 x 108972 (PETSc Krylov solver). demo_elasticity: /usr/local/packages/src/petsc-3.3/src/ksp/pc/impls/gamg/agg.c:1522: PCCreateGAMG_AGG: Assertion `!pc_gamg->subctx' failed. ========================================================================== Is there any other parameter which needs to be set to enable "agg" ? And what is the default type if I don't set to either "agg" or "geo" ? Thanks, Antony
