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</div></div>So this is a different KSP; not the one you want to use fieldsplit on?<br></blockquote><div><br></div><div>Yes,</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">

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Please always use different prefixes for different solvers.<br>
</blockquote></div><br></div><div class="gmail_extra">We use prefixes.  I left them out of the example.  So things like <span style="font-family:arial,sans-serif;font-size:13px">'-s2_pc_type </span><span style="font-family:arial,sans-serif;font-size:13px">fieldsplit</span><span style="font-family:arial,sans-serif;font-size:13px">' cause an error.  The 's2_' solver is a one field (Laplacian) solve.</span></div>
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