<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>If there is indeed a bug with load_fld please report an issue on Github an provide the necessary details. This way we can fix it.</div><div><br></div><div>Stefan </div><div><br>On 24 Mar 2017, at 09:16, "<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>
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Hello again,<br>
<br>
1. I use "mpixlf77" and "mpixlc_r" for fortran and C compilers, <br>
respectively.<br>
<br>
2. Is it possible for you to run the case that you are attempting on <br>
IDRIS, on<br>
a different server? Perhaps, by comparing the output files for the two you<br>
might get an idea of resolving the problem. Can you check if you are <br>
able to<br>
run examples from NeK repository on IDRIS?<br>
<br>
3. I would suggest that you try load_fld subroutine first. It might <br>
work for you<br>
as we used "load_fld" to read base flow as well perturbation variables.<br>
To circumvent this problem on IDRIS, we use "mfi" subroutine of nek with <br>
slight<br>
modifications.<br>
<br>
Cheers.<br>
<br>
N.<br>
<br>
On Friday 24 March 2017 09:00 AM, <a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a> wrote:<br>
> 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>
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><br>
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