<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">This usually means that either the model blows up due to numerical instabilities (and this is then reflected in strangely low values of Eta), or more likely that you are continuously loosing “mass”/volume and your sea surface height is dropping, or if you are using sea ice, then the ice thickness may be too high and depresses your surface too much. Check your mean and minimum Eta (e.g. from the monitor output dynstat_eta_mean/min) over time to find out. How to fix this depends on your general configuration, which I know nothing about.<div class=""><br class=""></div><div class="">Martin<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 18. Jul 2022, at 13:42, Haoran Xu <<a href="mailto:xu1jian2wei3@163.com" class="">xu1jian2wei3@163.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=gb2312" class=""><div style="line-height: 1.7; font-size: 14px; font-family: Arial;" class=""><div class=""><span style="font-size: 16px;" class="">Dear all，</span></div><div class=""><span style="font-size: 16px;" class=""> Hope everything's fine, I recently encountered a error when the model running for 4 years, the rStarFac[C,W,S] are too small.</span></div><div class=""><br class=""></div><div class=""><div class=""><span style="font-size: 12px;" class=""> fail at i,j= 21 3 ; rStarFacC,H,eta = 0.008609 2.000000E+01 -1.982781E+01</span></div><div class=""><span style="font-size: 12px;" class=""> fail at i,j= 21 4 ; rStarFacS,H,eta = -0.051725 2.000000E+01 -1.982781E+01 -2.225077E+01</span></div><div class=""><span style="font-size: 12px;" class=""> fail at i,j= 22 4 ; rStarFacC,H,eta = -0.215612 2.000000E+01 -2.431223E+01</span></div><div class=""><span style="font-size: 12px;" class=""> fail at i,j= 22 4 ; rStarFacW,H,eta = -0.164265 2.000000E+01 -2.225077E+01 -2.431223E+01</span></div><div class=""><span style="font-size: 12px;" class=""> fail at i,j= 22 5 ; rStarFacS,H,eta = -0.177673 2.000000E+01 -2.431223E+01 -2.279858E+01</span></div><div class=""><span style="font-size: 12px;" class="">WARNING: r*FacC < hFacInf at 2 pts : bi,bj,Thid,Iter= 1 1 1 35071</span></div><div class=""><span style="font-size: 12px;" class="">WARNING: r*FacW < hFacInf at 1 pts : bi,bj,Thid,Iter= 1 1 1 35071</span></div><div class=""><span style="font-size: 12px;" class="">WARNING: r*FacS < hFacInf at 2 pts : bi,bj,Thid,Iter= 1 1 1 35071</span></div><div class=""><span style="font-size: 12px;" class="">STOP in CALC_R_STAR : too SMALL rStarFac[C,W,S] !</span></div></div><div class=""><br class=""></div><div class=""><span style="font-size: 16px;" class=""> I've tried to change the value of depth or eta but not work. Thanks for any advices.</span></div></div>_______________________________________________<br class="">MITgcm-support mailing list<br class=""><a href="mailto:MITgcm-support@mitgcm.org" class="">MITgcm-support@mitgcm.org</a><br class="">http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support<br class=""></div></blockquote></div><br class=""></div></body></html>