<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Mar 14, 2012, at 11:08 AM, John Mousel wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">I'm getting the following error when using GAMG.<br><br>petsc-dev/src/ksp/pc/impls/gamg/agg.c:508: smoothAggs: Assertion `sgid==-1' failed.<br></blockquote><div><br></div><div>Is it possible that your matrix is structurally asymmetric?</div><div><br></div><div>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).</div><div><br></div><blockquote type="cite"><br>When I try to alter the type of aggregation at the command line using -pc_gamg_type pa, I'm getting <br>
<br>[0]PETSC ERROR: [1]PETSC ERROR: --------------------- Error Message ------------------------------------<br>[1]PETSC ERROR: Unknown type. Check for miss-spelling or missing external package needed for type:<br>see <a href="http://www.mcs.anl.gov/petsc/documentation/installation.html#external">http://www.mcs.anl.gov/petsc/documentation/installation.html#external</a>!<br>
[1]PETSC ERROR: Unknown GAMG type pa given!<br><br>Has there been a change in the aggregation options? I just pulled petsc-dev this morning.<br><br></blockquote><div><br></div><div>Yes, this option is gone now. You can use -pc_gamg_type agg for now.</div><div><br></div><div>Mark</div><br><blockquote type="cite">John<br>
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