[gradsusr] SDF Error: 365 day calendars are no longer supported by sdfopen.

[Jennifer Adams]

This question has already been answered many times in the forum. Here  
are just a few threads to choose from (search string was  
"site:gradsusr.org 365 calendar sdfopen") :

http://gradsusr.org/pipermail/gradsusr/2009-December/010064.html
http://gradsusr.org/pipermail/gradsusr/2009-April/008489.html
http://gradsusr.org/pipermail/gradsusr/2009-January/008103.html
http://gradsusr.org/pipermail/gradsusr/2011-April/013123.html

The error message delivered by GrADS is carefully written to give you  
the information you need -- you must write a descriptor file to open  
this file with GrADS. Your descriptor file must have the following  
entries:
DSET
TDEF
OPTIONS 365_day_calendar
The link to the documentation in the error message shows you how to  
create these entries, and help you decide whether you need to use  
'xdfopen' or the 'open' command. If the documentation is incomplete in  
any way, I welcome suggestions for improvements.

If you read the documentation carefully, and go through the previous  
emails on this subject, and still don't understand what to do, then  
please follow these guidelines:

Include the version of GrADS you are running, and the OS you are  
running it on.
Include the output from ncdump -c on your netcdf file
Include the descriptor file you've written
Include the complete text of your GrADS session including the error  
message

This is the last time I will answer this question.
--Jennifer




On Jun 13, 2011, at 12:53 PM, Tummuri, Spandana wrote:

> Hello Everyone,
>
> I was wondering if one of you would be able to tell me how you  
> addressed this issue.
>
> I am not very good at GRADS programming.  I only needed to use it to  
> open a “.nc” file and get some values averaged over a period of  
> time.  So I typically use the following three commands in grads.
>
> Sdfopen “filename.nc”
> Run monmask.gs N           ……………….(N = month)
> d ave(aave(pr*mmask, lon=lon1, lon = lon2, lat = lat1, lat =  
> lat2),t=time1,t=time2)
>
> This worked for a few files but when I tried to use it on some  
> others, I get the following error
>
>
> ga-> sdfopen pr_A1.nc
> Scanning self-describing file:  pr_A1.nc
> SDF Error: 365 day calendars are no longer supported by sdfopen.
>   To open this file with GrADS, use a descriptor file with
>   a complete TDEF entry and OPTIONS 365_day_calendar.
>   Documentation is at http://iges.org/grads/gadoc/SDFdescriptorfile.html
>
> When I compared NCDUMP for the files for which “sdfopen” worked with  
> the those for which “sdfopen” did not work, I noticed that the  
> calendar has to be gregarian for sdfopen to work.
>
> Can you tell me how I can open files that have “noleap” calendars  
> and work around the 365_day_calendar issue?
>
> I greatly appreciated your help in this matter.
>
> Thank you.
> Spandana
>
>
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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