Mark,<br><br>The matrix is asymmetric. Does this require the setting of an option?<br>I pulled petsc-dev this morning, so I should have (at least close to) the latest code.<br><br>John<br><br><div class="gmail_quote">On Wed, Mar 14, 2012 at 10:54 AM, Mark F. Adams <span dir="ltr"><<a href="mailto:mark.adams@columbia.edu">mark.adams@columbia.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><br><div><div class="im"><div>On Mar 14, 2012, at 11:08 AM, John Mousel wrote:</div><br>
<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><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 class="im"><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" target="_blank">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><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>
</blockquote></div><br></div></blockquote></div><br>