<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; ">My guess is that your matrix is structurally unsymmetric.<div><br><div><div>On Sep 4, 2013, at 11:16 AM, 丁老师 <<a href="mailto:ztdepyahoo@163.com">ztdepyahoo@163.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="line-height: 1.7; font-size: 14px; font-family: arial; "> 1] ***ASSERTION failed on line 243 of file /home/ztdep/Downloads/petsc-3.3-p6/externalpackages/parmetis-4.0.2-p3/libparmetis/match.c:k >= firstvtx && k < lastvtx<br>[ 1] 2562 5124 10 0 0<br>main: /home/ztdep/Downloads/petsc-3.3-p6/externalpackages/parmetis-4.0.2-p3/libparmetis/match.c:243: libparmetis__Match_Global: Assertion `k >= firstvtx && k < lastvtx' failed.<br><br><div style="line-height: 1.7; font-size: 14px; font-family: arial; "><div style="line-height: 1.7; font-size: 14px; font-family: arial; "><div style="line-height: 1.7; font-size: 14px; font-family: arial; "><br></div><div style="line-height: 1.7; font-size: 14px; font-family: arial; "><div style="line-height: 1.7; font-size: 14px; font-family: arial; "><br></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span></blockquote></div><br></div></body></html>