<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">It sounds like your -ksp_rtol is too small. Experiment with looser tolerances until your solution is not "correct" to see how much accuracy you want.<div><br><div><div>On Jul 7, 2012, at 12:15 PM, w_ang_temp wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><div> Maybe it is a problem of mathematical concept. I compare the result with the true result which is </div>
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<div>computed and validated by other tools. I think it is right if I get the same result.</div>
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<div><br></div>在 2012-07-08 00:03:21，"Matthew Knepley" <<a href="mailto:knepley@gmail.com">knepley@gmail.com</a>> 写道：<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" id="isReplyContent">On Sat, Jul 7, 2012 at 10:00 AM, w_ang_temp <span dir="ltr"><<a href="mailto:w_ang_temp@163.com" target="_blank">w_ang_temp@163.com</a>></span> wrote:<br>
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<div>Hello,</div>
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<div> I am a little puzzled that I get the right result while the converged reason says that 'Linear solve did not</div>
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<div>converge due to DIVERGED_ITS iterations 10000'. This infomation means that the iterations reach the maximum</div>
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<div>iterations. But the result is right now. So why says 'did not converge'? Can I think that the result is right and </div>
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<div>can be used?</div></div></blockquote>
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<div>Obviously, your definition of "right" is not the same as the convergence tolerances you are using.</div>
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<div> Matt</div>
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<div> Thanks.</div>
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<div> Jim</div></div><br><br><span title="neteasefooter"><span></span></span></blockquote></div><br><br clear="all">
<div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener<br></blockquote></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span></blockquote></div><br></div></body></html>