Mark, The matrix is asymmetric. Does this require the setting of an option? I pulled petsc-dev this morning, so I should have (at least close to) the latest code.
John On Wed, Mar 14, 2012 at 10:54 AM, Mark F. Adams <mark.adams at columbia.edu>wrote: > > On Mar 14, 2012, at 11:08 AM, John Mousel wrote: > > I'm getting the following error when using GAMG. > > petsc-dev/src/ksp/pc/impls/gamg/agg.c:508: smoothAggs: Assertion > `sgid==-1' failed. > > > Is it possible that your matrix is structurally asymmetric? > > This code is evolving fast and so you will need to move to the dev version > if you are not already using it. (I think I fixed a bug that hit this > assert). > > > When I try to alter the type of aggregation at the command line using > -pc_gamg_type pa, I'm getting > > [0]PETSC ERROR: [1]PETSC ERROR: --------------------- Error Message > ------------------------------------ > [1]PETSC ERROR: Unknown type. Check for miss-spelling or missing external > package needed for type: > see http://www.mcs.anl.gov/petsc/documentation/installation.html#external! > [1]PETSC ERROR: Unknown GAMG type pa given! > > Has there been a change in the aggregation options? I just pulled > petsc-dev this morning. > > > Yes, this option is gone now. You can use -pc_gamg_type agg for now. > > Mark > > John > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120314/c7c6b1c4/attachment.htm>
