<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hi Yunan,<div><br></div><div>Is the simulation aborting or continuing on? </div><div><br></div><div>This “error” is coming from the MGD solver and I see that the hypre solver is not taking any iterations and that it is happening for every energy group. Are you initializing the radiation temperature? Sometimes this can happen when there is little to nothing to happen during the mgd solve and the solution carries on normally.<br id="lineBreakAtBeginningOfMessage"><div>
<div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">*********************************************<br>Adam Reyes</div><br class="Apple-interchange-newline"><span><img alt="FLASH.jpg" src="cid:EA5A7E59-94B9-4162-879C-B52E774AEA24"></span><meta charset="UTF-8"><br style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); 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<div><br><blockquote type="cite"><div>On May 8, 2024, at 5:12 PM, cya_@nudt.edu.cn wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div class="default-font-1715181258788" style="font-size: 14px; font-family: 宋体, arial, Verdana, sans-serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><p style="margin: 0px 0px 14px;"><span style="font-family: Arial;">Dear FLASH Users,</span></p><p style="margin: 0px 0px 14px;"><span style="font-family: Arial;">I encountered some problems in the simulation of direct-drive ICF. After running the code, I saw the follows</span><span style="font-family: Arial;"> in the output file</span><span style="font-family: Arial;">. </span></p><p style="margin: 0px 0px 14px;"><span style="font-family: Arial;">[gr_hypreSolve]: Nonconv./failure ierr=1, descr=[Generic error], group no=1, converged=F, |initial RHS|^2=NaN, num_iterations=0, final_res_norm=0.0000000000000000<br> [RadTrans] ***** ERROR DETECTED IN Diffuse_solveScalar !!! **** -1 1 3 1 1 0 F 0<br>[gr_hypreSolve]: Nonconv./failure ierr=1, descr=[Generic error], group no=2, converged=F, |initial RHS|^2=NaN, num_iterations=0, final_res_norm=0.0000000000000000<br> [RadTrans] ***** ERROR DETECTED IN Diffuse_solveScalar !!! **** -1 2 3 1 1 0 F 0<br>[gr_hypreSolve]: Nonconv./failure ierr=1, descr=[Generic error], group no=3, converged=F, |initial RHS|^2=NaN, num_iterations=0, final_res_norm=0.0000000000000000<br> [RadTrans] ***** ERROR DETECTED IN Diffuse_solveScalar !!! **** -1 3 3 1 1 0 F 0<br>[gr_hypreSolve]: Nonconv./failure ierr=1, descr=[Generic error], group no=4, converged=F, |initial RHS|^2=NaN, num_iterations=0, final_res_norm=0.0000000000000000<br> [RadTrans] ***** ERROR DETECTED IN Diffuse_solveScalar !!! **** -1 4 3 1 1 0 F 0<br>[gr_hypreSolve]: Nonconv./failure ierr=1, descr=[Generic error], group no=5, converged=F, |initial RHS|^2=NaN, num_iterations=0, final_res_norm=0.0000000000000000<br> [RadTrans] ***** ERROR DETECTED IN Diffuse_solveScalar !!! **** -1 5 3 1 1 0 F 0<br>[gr_hypreSolve]: Nonconv./failure ierr=1, descr=[Generic error], group no=6, converged=F, |initial RHS|^2=NaN, num_iterations=0, final_res_norm=0.0000000000000000<br> [RadTrans] ***** ERROR DETECTED IN Diffuse_solveScalar !!! **** -1 6 3 1 1 0 F 0<br> n t dt ( x, y, z) | dt_hydro dt_Diff dt_HeatXc<br> 1 1.0000E-12 1.1000E-12 ( 0.468 , 0.294 , 0.00 ) | 6.516E-08 1.645E+84 1.567+103</span><span style="font-family: Tahoma;"><br></span><span style="font-family: Arial;"><br></span></p><p style="margin: 0px 0px 14px;"><span style="font-family: Arial;">I want to know why these occur. Any possible suggestions would be great appreciated!</span></p><span style="font-family: Arial;">Best wishes, <br>Yunan </span><span style="font-family: Arial;">Chen</span></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">flash-users mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><a href="mailto:flash-users@flash.rochester.edu" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">flash-users@flash.rochester.edu</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">For list info, including unsubscribe:</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><a href="https://flash.rochester.edu/mailman/listinfo/flash-users" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">https://flash.rochester.edu/mailman/listinfo/flash-users</a></div></blockquote></div><br></div></body></html>