Newbie questions!

Mon Nov 14 12:52:03 EST 2005

Bob,

This could be a unix2dos or dos2unix problem.  I think the ctl file can not have CR/LF pairs in line breaks.

Eric
  ----- Original Message ----- 
  From: Bob 
  To: GRADSUSR at LIST.CINECA.IT 
  Sent: Tuesday, November 15, 2005 4:05 AM
  Subject: Re: Newbie questions!

  Still no luck!! Whatever I do, I still get those can`t open file errors.

  Thanks for your help though. I`m running the win32e version.

    ----- Original Message ----- 
    From: Jean Pierre Arabonis 
    To: GRADSUSR at LIST.CINECA.IT 
    Sent: Monday, November 14, 2005 12:49 PM
    Subject: Re: Newbie questions!

    Hi Bob
        Should not matter where you put them, check that the model.ctl file has the fist line looking like so: 
    dset ^model.grb
    and not pathed somewhere else, check the permissions on teh files you need to at least be able to read them.
    Note that if you are running grads from another directory than the one where the files reside you bust give the absolute path to the control file, eg 

    ga> open /your full path/model.ctl

    Your directory holding the files should look somthing like so:

    arabonis at baltic:/mnt/pacific/data/gradstut/atmosdata> ls -lat
    total 593
    -rw-r--r--  1 arabonis osis 593060 Jan 14  2003 model.grb
    -rw-r--r--  1 arabonis osis   4633 Jan 14  2003 model.gmp
    drwxr-xr-x  2 arabonis osis    144 Jan 14  2003 ./
    -rw-r--r--  1 arabonis osis    651 Jan 14  2003 model.ctl
    drwxr-xr-x  4 arabonis osis    104 Jan 14  2003 ../

    and the ctl file like so:

    arabonis at baltic:/mnt/pacific/data/gradstut/atmosdata> cat model.ctl
    dset ^model.grb
    title "Sample Model Data for GrADS Tutorial"
    undef 1e+20
    dtype grib
    index ^model.gmp
    xdef 72 linear 0.000000 5.000000
    ydef 46 linear -90.000000 4.000000
    zdef 7 levels
    1000 850 700 500 300 200 100
    tdef 5 linear 0Z2jan1987  1dy
    vars 8
    ps        0    1,  1,  0,  0 Surface pressure [hPa]
    u         7   33,100 Eastward wind [m/s]
    v         7   34,100 Northward wind [m/s]
    z         7    7,100 Geopotential height [m]
    t         7   11,100 Air Temperature [K]
    q         7   51,100 Specific humidity [kg/kg]
    ts        0   11,105,  2 Surface (2m) air temperature [K]
    p         0   59,  1,  0,  0 Total precipitation rate [kg/(m^2*s)]
    endvars

    Hope this helps
        JP

    Bob wrote:

      Thankyou, 

      I have the datafiles all in the same directory. I have placed them in the main Grads folder, and tried in just about every other folder too but I still get the error. 

      I can`t think of anything else to try!! I`ve been waiting to play around with Grads for ages, but find this frustrating that I can`t even get off the starting block :D 

      Is there a specific place where the datafiles (ctl, grib) should go? 

      Ron. 
        ----- Original Message ----- 
        From: Jean Pierre Arabonis 
        To: GRADSUSR at LIST.CINECA.IT 
        Sent: Monday, November 14, 2005 12:25 PM
        Subject: Re: Newbie questions!

        Hi Bob
            Welcome to grads, firstly I feel that grads is better suited to the linux environment - besides being basically anti-windows, you'll find a lot of the users of grads are working in a unix/linux environment and user support is probably better in that area, further for automation of grads scripts, linux is very flexible (which seems to be your ultimate goal).
            It seems though there have been some library issues with recent versions of grads on certain flavours of linux, red hat does not seem to be one of them   but a trawl of the archives should resolve any compatibility issues.
            With regard to load, thats going to depend on your input files and what you do with them, however grads is very stable and will generally complete the task without falling over. I have grads running on an old 450 MHz P2 running scripts and it works just fine.
            With regard to your problem with the model file it seems to me to be a path problem, the data file and ctl file must be in the same directory.
            Good Luck
               Jean Pierre

        Bob wrote:

          Hi all, 

          I`ve never used Grads before, so it`s a completely new ball game for me!! The most ambitious I`ve been is to use a desktop utility likes DAWS! 

          I have several questions to ask, where the answers could not be found on the Cola homepage. 

          I would like to install Grads on my server, mainly so I can ingest and display grib data/model charts on my website. What kind of server loads would I be looking at here? I need to know, whether my server can cope with it it!! Can someone shed some light on using Grads on a redhat linux based server? 

          Secondly, I haven`t looked through any of the documentation as yet. I thought it might be a good idea to install the windows version locally on my W2K PC first, so I can get an idea of how Grads works. 

          I believe I have it installed correctly, but I can`t even get off the starting block!! I tried to open the demo model.ctl file that comes with the online tutorial - all I get are errors `Scanning description file:  model
          Open Error:  Can't open description file` 

          Do I need to place the ctl, grib and gmp in a certain folder? All the tutorial says is download them and place them locally. Thanks. 

          Regards, 
          Ron. 

--
Jean Pierre Arabonis
arabonis at egs.uct.ac.za
Tel 021 780 1021 cell 084 401 1365
This email is 100% Microsoft Free

--
Jean Pierre Arabonis
arabonis at egs.uct.ac.za
Tel 021 780 1021 cell 084 401 1365
This email is 100% Microsoft Free
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