[Nek5000-users] A Restart Issue with NaNs

[nek5000-users at lists.mcs.anl.gov]

I don't believe it is corrupted. I min/max values given after the restart files load looks good, and I also 

just confirmed it using glmax/glmin. 



Also, I have several restart files that I have tried, all resulting in the same problem. I have also looked 

at them in visit and everything looks consistent from what I had before, could it still be corrupted even then? 



I have 5   *.f  files in increments of 4 seconds. I terminated the run to change something with 'echo -2 >ioinfo'.  

Fld files 3-5 give the problem, while number 2 worked. 





-Michael 


----- Original Message ----- 
From: nek5000-users at lists.mcs.anl.gov 
To: "Nekton User List" <nek5000-users at lists.mcs.anl.gov> 
Sent: Tuesday, November 30, 2010 7:21:09 PM GMT -06:00 US/Canada Central 
Subject: Re: [Nek5000-users] A Restart Issue with NaNs 

Hi Micheal, How did this computation finish on the prior run? Is the data corrupted? (i.e., are there nans in the file?) You might try setting nsteps to zero and then checking via glmin/glmax or something to see if the restart file is corrupted. Paul On Tue, 30 Nov 2010, nek5000-users at lists.mcs.anl.gov wrote: > > > Hi, > > > > I am having an issue with a simulation in which I restart using the restart options in the Rea file. At the very first time step > > I get NaN's in the Helmholtz VelZ .  I have done several restarts of the same simulation at earlier points to arrive at where I am at > > now, however I get this upon trying to continue the simulation further.  > > > > Any ideas on why this could be, or how to troubleshoot it?  I'm not sure what I could do since this is showing up on the very > > first time step. > > > > Thanks a lot, > > Michael > 
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