[Nek5000-users] VisIt error: The first time step in a Nek file must contain a mesh

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

Hi Muhsin,

Could you solve your problem? It's weird but I kinda have the same 
issue. I'm working on an example for heat transfer in a rectangle (2D 
problem) and when I use elements of the form 2X2 or 4X4 it works fine. 
However, when I increase the number of elements to, say, 8X8 (to exploit 
using more nodes of course), although the solver works fine and 
generates all the corresponding fld files as expected but there is the 
error of "The first time step in a Nek file must contain a mesh" in 
Visit. As I said, for fewer number of elements for very same problem I 
don't get the problem. I appreciate if you or anyone share any solutions 
here. Just to reiterate, I also checked the first line of first time 
step and meta data, etc. but found no issue.

PS is there a way to export results as csv without referring to Visit? 
If it is so, I'd sometimes prefer to use it.

Best,
Saleh

On 12/18/2014 7:54 AM, nek5000-users at lists.mcs.anl.gov wrote:
> Hi all,
>
> I get error of mesh need to contain the first time step in Nek file 
> everytime I run .nek5000 file from results of some example 
> (turbchannel, blasius and expansion). However for the 3dbox example, I 
> got no error to open it.
> I've checked the first line in the first time step file (.f00001) and 
> have the geometry (X) in them. I also changed the logic for coordinate 
> output to (T COORDINATES) and different param66, but still getting the 
> same error. Perhaps even if I put the mesh output for each timestep 
> not just in first timestep, I still getting the same error. Note that 
> I've already set the right plugin and type file during open the 
> .Nek5000 file. In addition, I've checked the same parameters for 3dbox 
> example which is same with the other example rea file, plus 3dbox 
> still gives me no error even if i not switch the coordinate output to 
> true (F COORDINATES)
>
> I really hope that anyone who has encountered the same problem and has 
> solved it to assist me. That would be really helpful.
>
> Regards,
> -- 
> Muhsin Mohd Amin
> Graduate Student
> Department of Mechanical Engineering
> The University of Sheffield
>
>
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