<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>I am not aware of a bug like this. On BG you want to use the IBM compilers. Did you try the latest version on GitHub?</div><div><br></div><div>You can also try to run one of our examples or short tests to check your installation.</div><div><br></div><div>Can you please trap NaNs to see where they occur the first time.</div><div><br></div><div>Stefan</div><div><br>On 24 Mar 2017, at 09:01, "<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>" <<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>> wrote:<br><br></div><blockquote type="cite"><div>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Kopano HTML builder 1.0">
<title></title>
<!-- Converted from text/plain format -->
<p><font style="font-family: courier" size="2">
Hello,<br>
<br>
Thank you very much for your answear, could you please share more detail about your changes?<br>
<br>
1: What compilers did you chose?<br>
2: I will do that<br>
3: I read only standard file, I don't have to read fld (yet), the fileds is initialized with an analytical form, and it fail just after the setup phrase, it show NaN in one columm of Hemholtz step. <br>
But I will have to read on fld file, what alternative methode did you use? <br>
<br>
Thank you again,<br>
<br>
Best,<br>
<br>
Le Vendredi 24 Mars 2017 08:25 CET, <a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a> a écrit: <br>
<br>
> Hello,<br>
> <br>
> I recently moved my computations to the blue-gene server of<br>
> IDRIS. I had to make the following modifications to make the code<br>
> run on this server:<br>
> <br>
> 1. Change the compiler settings. A page containing the details<br>
> of the various compilers are given on IDRIS website.<br>
> <br>
> 2. There were some issues with the sub-block submission. Sometimes the<br>
> the computations hung displaying "permission denied". So I was advised<br>
> to use compute blocks in multiple of 64.<br>
> <br>
> 3. Can you check which step of your code gives NaN? Is it because of<br>
> an error in reading any file? In my simulations, apparently, "load_fld'<br>
> subroutine was causing a problem so I used an alternate method to read<br>
> the files.<br>
> <br>
> Hope these help.<br>
> <br>
> N.<br>
> <br>
> On Thursday 23 March 2017 08:32 PM, <a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a> wrote:<br>
> > Hi,<br>
> ><br>
> > I have trouble running Nek in BlueGene in IDRIS, French national supercalculator: the compilation show no error, but the output give NaN before the time loop start. I looked in the internet and I found 1 person ask almost the same question 4 years ago (In my case the compilation was fine), but I can't find the answear.<br>
> ><br>
> > Are there anyone ran Nek5000 in IDRIS can share their experience?<br>
> ><br>
> > Thank you guy,<br>
> ><br>
> ><br>
> ><br>
> > _______________________________________________<br>
> > Nek5000-users mailing list<br>
> > <a href="mailto:Nek5000-users@lists.mcs.anl.gov">Nek5000-users@lists.mcs.anl.gov</a><br>
> > <a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users">https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users</a><br>
> <br>
> _______________________________________________<br>
> Nek5000-users mailing list<br>
> <a href="mailto:Nek5000-users@lists.mcs.anl.gov">Nek5000-users@lists.mcs.anl.gov</a><br>
> <a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users">https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users</a><br>
<br>
<br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
Nek5000-users mailing list<br>
<a href="mailto:Nek5000-users@lists.mcs.anl.gov">Nek5000-users@lists.mcs.anl.gov</a><br>
<a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users">https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users</a><br>
</font>
</p>
</div></blockquote></body></html>