Re: addfiles

Dear Dave, Gus, and Mary:

Thank you very much for your help!

With the suggestion from Dave and Gus, the problem is solved. The version of NCL I used is 5.0.0. So we need to update it. However, I encountered another problem for a ncl statement as:

smm = f1[:]->soil_moisture(:,:,:,:) with the following error info.

fatal:NclMalloc Failed:[errno=12]
fatal:_NclBuildArray : Memory allocation failure
fatal:Execute: Error occurred at or near line 34 in file read_plot_1.ncl

If I make a change as

smm = f1[:]->soil_moisture(:,0,:,:)

It works.

The system of our workstation is linux with the following memory size:

 $ cat /proc/meminfo |grep -i memtotal
MemTotal: 7886772 kB

The dim of soil_moisture is (12,4,323,322), and that of f1 is (58)

The problem occurred is because the memory is not enough? Can I make other setting so that the problem can be solved? how?

Thank you!

Regards
Ed

--- On Fri, 4/16/10, David Brown <dbrown@ucar.edu> wrote:

> From: David Brown <dbrown@ucar.edu>
> Subject: Re: addfiles
> To: "Yang Yang" <yang123yang@yahoo.com>
> Cc: "ncl-talk forum" <ncl-talk@ucar.edu>
> Date: Friday, April 16, 2010, 12:55 AM
> Hi Ed,
>
> It looks like you are using an opendap-enabled version of
> NCL.  If it a version of NCL earlier than 5.2.0 then
> all NetCDF file access is through the OPeNDAP NetCDF
> client  library which limits the number of simultaneous
> connections (open files) to 64. Given that there are a small
> number of connections that are pre-allocated and not
> actually available, it is not surprising that you are
> running out of descriptors. The solution is to use the
> setfileoption procedure:
>
> setfileoption("nc", "SuppressClose", False)
>
> prior to your addfiles call. See the last paragraph of the
> addfiles Description section at http://www.ncl.ucar.edu/Document/Functions/Built-in/addfiles.shtml.
>
> -dave
>
>
> On Apr 15, 2010, at 10:11 AM, Mary Haley wrote:
>
> > Hi Ed,
> >
> > I don't think opening 58 files should be a problem,
> unless they are
> > large and you run
> > out of memory. I created a dummy set of 59 files and
> read them all
> > fine with a
> > single call to "addfiles".
> >
> > What version of NCL are you running (ncl -V)?
> >
> > Are the files on the web somewhere that I can access
> them? You can email
> > me offline with this information.
> >
> > If you can't provide the files, then I will need more
> information,
> > like how you
> > are trying to open the files, (using "cat" or "join"),
> whether you
> > are getting
> > any other error messages, etc.
> >
> > Thanks,
> >
> > --Mary
> >
> >
> >
> > On Apr 14, 2010, at 9:55 PM, Yang Yang wrote:
> >
> >> Hello:
> >>
> >> I have 58 files and want to use addfiles to add
> them together.
> >> However, NCL shows the follow information:
> >>
> >> add_connect: too many connects, cannot add
> another
> >> ncinquire: ncid -1: NetCDF: Not a valid ID
> >> add_connect: too many connects, cannot add
> another
> >> ncinquire: ncid -1: NetCDF: Not a valid ID
> >>
> >> Can you tell me at most how many files I can use
> addfiles to add
> >> them together? Thanks!
> >>
> >> Regards
> >> Ed
> >>
> >>
> >>
> >> _______________________________________________
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Received on Thu Apr 15 15:51:40 2010