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Re: error in accessing an OpenDAP aggregation server



Hi Paul -

It looks like the cause of the the problem is that you are attempting to access the data via an older version of the Unidata Aggregation server. There was a bug in previous versions of the aggregation server which caused it to not work properly with clients that were built using the newest version of OPeNDAP libraries (such as v5.70 of Ferret).

However, looking through the "opendap.aviso.oceanobs.com" pages, I see that they do have the more recent version of the Unidata aggregation server installed. Try accessing the dataset at this URL:

http://opendap.aviso.oceanobs.com/thredds/dodsC/en/h/msla_oer_en_err

Let me know if this doesn't solve the problem.....

Kevin


Paul Hasenohr wrote:

Dear Ferret users,

I try to access data via OpenDAP from Ferret v5.7.
I have set up locally (linux debian) a DODS Freeform server and an Aggregation server.
I can access from Ferret data served via the Freeform server but not the same data served via the Aggregation server (I can access it from a browser).
If I make a dncdump -h of both, I get exactly the same output.

I then tried to access a publically available Aggregation Server (http://opendap.aviso.oceanobs.com/dodsC/en/h/msla_oer_en_err) and I encountered the same problem.

The error message I get is:
yes? use "http://opendap.aviso.oceanobs.com/dodsC/en/h/msla_oer_en_err";
** netCDF error: Invalid Argument
is this a CDF file ?

Do I something wrong or is there a problem with this release of Ferret ?

My final goal is to set up a LAS server to access my data served via an Aggregation server that would aggregate data served via a freeform server.

Thanks for any advice.

Best regards,
Paul Hasenohr



Paul HASENOHR
European Commission - Joint Research Centre
IPSC - Agriculture and Fisheries Unit
TP 266, 21020 ISPRA (VA), ITALY
Direct : +39 0332 78 62 22 - Fax : + 39 0 332 78 51 62
Web site: http://agrifish.jrc.it




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