<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Feb 9, 2017, at 1:37 PM, Matthew Knepley <<a href="mailto:knepley@gmail.com" class="">knepley@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote">On Thu, Feb 9, 2017 at 4:56 AM, Pierre Jolivet <span dir="ltr" class=""><<a href="mailto:pierre.jolivet@enseeiht.fr" target="_blank" class="">pierre.jolivet@enseeiht.fr</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br class="">
I _might_ be doing something wrong when calling KSPSetFromOptions/KSPSetUp, but still, am I supposed to get this kind of error?<br class="">
[0]PETSC ERROR: No support for this operation for this object type<br class="">
[0]PETSC ERROR: KSP gmres does not support PRECONDITIONED with RIGHT<br class="">
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If not, I’ll try to send a MWE (it basically depends on where I set the option -ksp_pc_side right).<br class="">
</blockquote><div class=""><br class=""></div><div class="">I believe its telling you that it cannot display the preconditioned residual with right preconditioning, which is true.</div><div class="">Are you requesting both?</div></div></div></div></div></blockquote><div><br class=""></div><div>No, I’m just using -ksp_view and -ksp_pc_side right. In the “standard” case, it obviously work.</div><div>However, the error is triggered if I set -ksp_pc_side right after a first call to KSPSetOperators()/KSPSetUp() without destroying the KSP.</div><div>Should I destroy my KSP before changing from left- (default) to right-preconditioning if KSPSetOperators()/KSPSetUp has already been called?</div><div><br class=""></div><div>Thanks.</div><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class=""> Thanks,</div><div class=""><br class=""></div><div class=""> Matt</div><div class=""> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Thanks,<br class="">
Pierre</blockquote></div><br class=""><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div class="gmail_signature" data-smartmail="gmail_signature">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br class="">-- Norbert Wiener</div>
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