Re: [netcdfgroup] Bad file ??

• Subject: Re: [netcdfgroup] Bad file ??
• From: Chris Barker <chris.barker@xxxxxxxx>
• Date: Wed, 2 Oct 2024 11:04:12 -0700

Thanks Roy, at least it's not just us, and that error did give me a hint,
look at this from ncdump-ing the header:

 float uo(time, depth, latitude, longitude) ;
string uo:units = "m s-1" ;
uo:_FillValue = NaN ;
string uo:standard_name = "eastward_sea_water_velocity" ;
string uo:long_name = "Eastward velocity" ;

There's no type for the uo:_FillValue attribute.

How in the world did that happen?

At least now I have a specific thing to point the file creators to.

-CHB






On Wed, Oct 2, 2024 at 10:58 AM Roy Mendelssohn - NOAA Federal <
roy.mendelssohn@xxxxxxxx> wrote:

> I can reproduce the error.  I tried to copy the file using mccoy,  got the
> following:
>
> nccopy cmems_mod_nws_phy_anfc_0.027deg-3D_P1D-m_1727700325546.nc test.nc
> NetCDF: Not a valid data type or _FillValue type mismatch
> Location: file ?; fcn ? line 1408
>
> hope this helps.
>
> -Roy
>
>
> > On Oct 2, 2024, at 10:46 AM, Chris Barker via netcdfgroup <
> netcdfgroup@xxxxxxxxxxxxxxxx> wrote:
> >
> > I have a user unable to use a netcdf file with our code.
> >
> > It turns out that the file works just fine when read, but if you try to
> open it for writing, it chokes:
> >
> > (this is the netCDF4 Python lib, version 1.6.5, which seems to be the
> latest release)
> >
> > I get:
> > In [3]: netCDF4.Dataset('
> cmems_mod_nws_phy_anfc_0.027deg-3D_P1D-m_1727700325546.nc', 'r+')
> >
> ---------------------------------------------------------------------------
> > OSError                                   Traceback (most recent call
> last)
> > Cell In[3], line 1
> > ----> 1 netCDF4.Dataset('
> cmems_mod_nws_phy_anfc_0.027deg-3D_P1D-m_1727700325546.nc', 'r+')
> >
> > File src/netCDF4/_netCDF4.pyx:2469, in
> netCDF4._netCDF4.Dataset.__init__()
> >
> > File src/netCDF4/_netCDF4.pyx:2028, in
> netCDF4._netCDF4._ensure_nc_success()
> >
> > OSError: [Errno -103] NetCDF: Can't write file: '
> cmems_mod_nws_phy_anfc_0.027deg-3D_P1D-m_1727700325546.nc'
> >
> > Any idea how I can get more info as to what's wrong with it?
> >
> > Again, we have had no problems reading the file.
> >
> > Thanks,
> > - CHB
> >
> > File is 1.2MB, (not huge by today's standards?) so I've attached it here
> if anyone wants to take a look.
> >
> >
> >
> >
> >
> >
> >
> > --
> >
> > Christopher Barker, Ph.D.
> > Oceanographer
> >
> > Emergency Response Division
> > NOAA/NOS/OR&R            (206) 526-6959   voice
> > 7600 Sand Point Way NE   (206) 526-6329   fax
> > Seattle, WA  98115       (206) 526-6317   main reception
> >
> > Chris.Barker@xxxxxxxx
> > <cmems_mod_nws_phy_anfc_0.027deg-3D_P1D-m_1727700325546.nc
> >_______________________________________________
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> >
> >
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>
> **********************
> "The contents of this message do not reflect any position of the U.S.
> Government or NOAA."
> **********************
> Roy Mendelssohn
> Supervisory Operations Research Analyst
> NOAA/NMFS
> Environmental Research Division
> Southwest Fisheries Science Center
> ***Note new street address***
> 110 McAllister Way
> Santa Cruz, CA 95060
> Phone: (831)-420-3666
> Fax: (831) 420-3980
> e-mail: Roy.Mendelssohn@xxxxxxxx www: https://www.pfeg.noaa.gov/
>
> "Old age and treachery will overcome youth and skill."
> "From those who have been given much, much will be expected"
> "the arc of the moral universe is long, but it bends toward justice" -MLK
> Jr.
>
>

-- 

Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R            (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chris.Barker@xxxxxxxx

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    • From: Chris Barker
  • Re: [netcdfgroup] Bad file ??
    • From: Roy Mendelssohn - NOAA Federal