[RegCNET] Error in preprocessing - RegCM-4.4-rc6

[Marshall L. Mdoka]

Dear Raymond,

Thanks.  For now,  I have just converted the .nc files.

Cheers,

Marshall
On 26 Jul 2013 08:52, "Raymond Arritt" <rwarritt at gmail.com> wrote:

> Dear Marshall,
>
> With regard to the error,
>
>
>>  Opening /home/mmdoka/Downloads/RegCM-**4.4-rc6/PreProc/DATA/SURFACE/**
>> GTOPO_DEM_30s
>>  .nc
>>  NetCDF: Unknown file format
>>
>>  I got an error like this too.  In my case it was caused by not having a
> current netCDF library linked to my code.  The RegCM group is now
> distributing files in a new version of netCDF that has transparent
> compression.  The benefit is that this decreases the file size by about 40%
> or so (sometimes more).
>
> If this is the problem there are two options to fix it:  (1) you could
> rebuild the code using the most current version of netCDF 4 with HDF5
> support, or (2) you could convert the files from the new format back to the
> old format (netCDF 3) using the command:
>
>  nccopy -k 1  file1.nc file2.nc
>
> Here file1.nc is the file that you currently have, in the new netCDF
> format.  The command will create file2.nc in the old netCDF format. Then
> file2.nc should be readable using your current build.
>
> For example you could do something like
>
> nccopy -k 1 GTOPO_DEM_30s.nc temp.nc
> mv temp.nc GTOPO_DEM_30s.nc
>
> Good luck!  I hope this is helpful for you.
>
> Ray Arritt
>
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