[ncl-talk] A Fatal Error Question: is this a bug in NCL?

[Rick Brownrigg]

Hi Barry,

On Linux, an errno=12 is an "out of memory" error.  I doubt that its
related directly to the systemfunc() call, but rather due to memory being
consumed by your script in previous iterations of the loop.  You might
check if there are variables that can be freed (i.e., deleted()) after each
iteration.

HTH...
Rick

On Sun, Jul 16, 2017 at 8:56 PM, Barry Lynn <barry.h.lynn at gmail.com> wrote:

> Hi:
>
> I have a program that does multiple loops.
>
> I had this error:
>
> 0) i_dir = 6
>
> fatal:systemfunc: cannot create child process:[errno=12]
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 84 in
> file ./plot_loop_700mb.ncl
>
>
> This occurred when reading the file from the sixth directory of 20.
>
>
> Here was the read from the 5th directory:
>
> (0) i_dir = 5
>
> (0) all_files(n) = /home/cust100021_vol1/barry/
> cust100021_vol2/GEFS/GEFS_05/gep05.t00z.pgrb2b.0p50.f084.grb
>
> Here is a listing of both files:
>
> They are both present, but the second attempted allocation/definition of
> the file fails with the read that follows:
>
>
> [barry at cust100021-login1 GEFS]$ ls -ltr /home/cust100021_vol1/barry/
> cust100021_vol2/GEFS/GEFS_05/gep05.t00z.pgrb2b.0p50.f084.grb
>
> -rw-r--r-- 1 barry cust100021 78985320 Jul 16 04:58
> /home/cust100021_vol1/barry/cust100021_vol2/GEFS/GEFS_05/
> gep05.t00z.pgrb2b.0p50.f084.grb
>
> [barry at cust100021-login1 GEFS]$ ls -ltr /home/cust100021_vol1/barry/
> cust100021_vol2/GEFS/GEFS_06/gep06.t00z.pgrb2b.0p50.f084.grb
>
> -rw-r--r-- 1 barry cust100021 80466702 Jul 16 04:58
> /home/cust100021_vol1/barry/cust100021_vol2/GEFS/GEFS_06/
> gep06.t00z.pgrb2b.0p50.f084.grb
>
> Here is the read:
>
>
>   print("i_dir = " + i_dir)
>
>   diri = dirWRF(i_dir) + "/"
>
> ; define individual file read
>
>    all_files = systemfunc("ls " + diri + "ge*pgrb2b*grb")
>
>    print("all_files(n) = " + all_files(n))
>
>   filename = all_files(n)
>
>
> Is the problem that I make this allocation multiple times, each directory,
> each file? Perhaps I should read all files at once into a two dimensional
> filename array?
>
>
> Thanks
>
>
>
> --
> Barry H. Lynn, Ph.D
> Senior Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> C.E.O, Weather It Is, LTD
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>
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