Re: [ferret_users] appending to file: history crash & time bounds

[Hella Riede <hella.riede@xxxxxxx>]

P.S. Appending within just one file works:

! some fantasy number
yes? let fnum = 148
! create var with value 'fnum' on same grid as 'slon'
yes? let/title="flight number" flight = if (slon) then fnum else fnum
yes? save/append/file=exit_all_nohist.nc flight
 LISTing to file exit_all_nohist.nc

This is what I wanted to do - just using the values from a second file 
instead of this fantasy fnum.

Looking forward to elucidation.

Best wishes,
Hella


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*Subject:* [ferret_users] appending to file: history crash & time bounds
*Sent:* Thu 20 Oct 2011 10:06:09 PM CEST +0200
*From:* Hella Riede <hella.riede@xxxxxxx>
*To:* ferret <oar.pmel.ferret_users@xxxxxxxx>

> Dear ferreters,
>
> in order to track the history of datasets, I create very long history
> lines. When I try to add a variable to such a dataset, ferret crashes
> and exits with the message " **ERROR Ferret crash; signal = 11". It took
> me some time to figure out that the crash is due to the long history
> attribute. I currently use version 6.70. Up to at least version 6.40,
> there was a warning issued:
> *** NOTE: CDF attribute history is too long
> *** NOTE: no text could be appended
> This is now seems not to be issued anymore.
>
>
> After cutting the history line, I get the following error:
> "NetCDF: Variable not found (OPeNDAP/netCDF Error code -49)
> timep_bnds not found. Attempt to append irregular coordinates to NetCDF
> axis which has no bounds attribute. Write data originally with the
> /BOUNDS qualifier."
> I found some information on that in the release notes to version 6.3.
> What I do not understand is that I just would like to add a variable,
> not additional time steps, to the file.
>
> ! I defined a variable
> ! d=1: test_all_short.nc
> ! d=2: test.nc
> yes? let/d=1 flight = flight[d=2,gt=slon[d=1]@ASN]
> ! then tried to append it
> yes? save/append/file=test_all_short.nc flight[d=1]
>
> The to-be-appended variable flight has the same grid as any variable in
> d=1:
> yes? sh grid flight
> GRID GMH1
> name axis # pts start end
> normal X
> normal Y
> normal Z
> TIMEP TIME 607 i 28-APR-2006 11:57 28-APR-2006 13:40
> yes? sh grid slon
> GRID GMH1
> name axis # pts start end
> normal X
> normal Y
> normal Z
> TIMEP TIME 607 i 28-APR-2006 11:57 28-APR-2006 13:40
>
> In my opinion there is no need for bounds when I really do not want to
> extend the file in time.
>
> Any clarification on this is very welcome, thanks in advance!
>
> Best regards,
> Hella

--

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 Hella Riede  (Dipl.Chem.)
 Max Planck Institute for Chemistry
 Dept. of Atmospheric Chemistry
 Becherweg 27
 55128 Mainz
 Germany

 email: hella.riede@xxxxxxx
 phone: +49-6131-305437

 www.mpch-mainz.mpg.de/~riede
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