[MITgcm-support] [MITgcm Manual] section 6.15 NetCDF I/O Integration: MNC

[Jean-Michel Campin]

Hi Phil,

Just 2 commnets:
1) Some of the documentation links you are pointed to are from
  the Release-1 version:
  > http://mitgcm.org/public/sealion/
  Probably better to look at the latest version:
  > http://mitgcm.org/public/r2_manual/latest/
  (more recent but not fully up-to-date neither).
2) The "WARNING" you are getting are related to failure in compiling/link
  NetCDF code/library. 
  When you run "genmake2", there are several tests to check if we have the
  right things set-up to compile and run with NetCDF. If this step is not
  successful, then ALLOW_MNC is disable and if you try to run with
  useMNC=T (data.pkg) you will get this warning message.
  To fix this, I would recommand to check the optfile you are using for 
  this platform (and to speed-up this task, you can probably figure out
   whether this works or  not just by running "genmake2").

Cheers,
Jean-Michel

On Wed, Jun 23, 2010 at 11:55:31AM +0100, Phil Underwood wrote:
> Comments and questions on page http://mitgcm.org/sealion/online_documents/node229.html
> 
> Hi there,
> 
> I am currently working on completion of the biogeochemistry tutorial (http://mitgcm.org/public/r2_manual/latest/online_documents/node155.html) and am amending the path names for the "c62g" release of the MITgcm. I have built a test script in order to submit the job to a Sun Grid Engine running on the parallel computing cluster here at my University. Every time the job is completed I get an output file from the system containing the following text:
> 
> ***WARNING*** PACKAGES_CHECK: useMNC is TRUE
> ***WARNING*** but pkg/mnc has not been compiled (#undef ALLOW_MNC)
> STOP NORMAL END statement executed
> 
> This is irrespective of whether the MITgcm is compiled with the -enable=mnc or -disable=mnc switches. I have also commented out #mnc in the "packages.conf" file within the "/MITgcm_c62g/verification/tutorial_dic_adjoffline/code_ad" directory. 
> 
> I imagine I would like to use MNC since I am under the impression that using NetCDF is likely to make the process of using the model output quicker. Can you tell me how I can get rid of that warning and exactly what I should in order to get the MITgcm running as I would like.
> 
> Regards,
> Phil
> 
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