<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="">If the objective function value at the solution is larger than the initial value it is probably safe to assume that the starting point is not feasible. The objective needs to increase in order to reduce the constraint violations. The iterates in an interior point algorithm like the one used by IPOPT need not be strictly feasible (and usually are not).<div class=""><br class=""></div><div class=""> Ray</div><div class=""><br class=""><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jun 4, 2015, at 1:07 AM, tonghan <<a href="mailto:hantong_eee@126.com" class="">hantong_eee@126.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><meta name="Generator" content="Microsoft Word 15 (filtered medium)" class=""><style class=""><!--
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</o:shapelayout></xml><![endif]--><div lang="ZH-CN" link="#0563C1" vlink="#954F72" style="text-justify-trim:punctuation" class=""><div class="WordSection1"><div class="MsoNormal"><span lang="EN-US" class="">I am using IPOPT in MATLAB. In my test , the objective value is becoming larger, and finially the EXIT information is “EXIT: Solved To Acceptable Level.” I really feel puzzled. Could anyone help me? Thanks in advance.<o:p class=""></o:p></span></div></div></div>_______________________________________________<br class="">Ipopt mailing list<br class=""><a href="mailto:Ipopt@list.coin-or.org" class="">Ipopt@list.coin-or.org</a><br class="">http://list.coin-or.org/mailman/listinfo/ipopt<br class=""></div></blockquote></div><br class=""></div></div></body></html>