Hi Saleh, sorry for the late reply, but one solution that I found is that reading the result in the Linux based system. I try to use Paraview, and it works to read the results in linux, but will get same error as in VisIt in windows. I'm not pretty sure what would be the problem. Regards, Muhsin On 16 March 2015 at 21:23, <[email protected]> wrote:

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, [email protected] 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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-- Muhsin Mohd Amin Graduate Student Department of Mechanical Engineering The University of Sheffield