[gradsusr] Mask/Scripting error

[Jeff Duda]

-Does the seventh file exist on your system?
-Are you opening too many files? I don't see any 'close' statements in your
script, so you may want to consider the ramifications of never closing
files if you're opening a large number of them.
-Are you running out of memory? Usually Grads just crashes entirely when
there's a memory error, but perhaps it's not in this instance.

Usually when it comes to debugging, the most comprehensive thing you can do
is a line-by-line print statement to see what's going on in the script
after each and every line. You can simplify by printing out only specific
lines that you think are critical, then subdivide sections of code down to
the source of the problem so that you don't have to literally issue a print
statement after every line.

Jeff Duda

On Thu, Jan 5, 2017 at 10:19 AM, Justin Hicks <jhicks2014 at gmail.com> wrote:

> GrADS users,
>
> I have come across a strange problem while running a gradscript. I am
> using this script to output average monthly data of different regions to a
> text file. Each block of commands contains a different mask, but uses the
> same datafile. The first block of commands is shown below:
>
>  'reinit'
> 'open /data2/control/Region00_WLD_mask_GLDAS.nc'
> 'set t 1 756'
> 'set dfile 1'
> 'set lon -179.5 179.5'
> 'set lat -89.5 89.5'
> 'sdfopen /data2/control/GLDAS_NOAH10_M.020.ctl_1Deg_RainfallRateSfc.nc'
> 'set dfile 2'
> 'set lon -179.5 179.5'
> 'set lat -89.5 89.5'
> 'set time 00Z01JAN1948'
> 'set dfile 1'
>  nmonths=756
>  i=1
>  while (i<=nmonths)
>  'set t 'i
> 'q file 1'
> region = sublin(result,2)
> region = subwrd(region,2)
> 'q file 2'
> dataset = sublin(result,2)
> dataset = subwrd(dataset,2)
>  'q dims'
>  rectime = sublin(result,5)
>  recdate = subwrd(rectime,6)
> 'd aave(maskout(rainfsfc.2*86400,lterp(mask.1(time=00Z01JAN1948
> ),rainfsfc.2)),lon=-179.5,lon=179.5,lat=-89.5,lat=89.5)'
>   say 't='i
>  say result
>  rainfsfc = sublin(result,1)
>  rainfsfc = subwrd(rainfsfc,4)
>  string = dataset' 'region' 'rectime' 'rainfsfc
>  rc=write('GLDAS_MASK_DATA.txt' ,  string ,'append')
>  i = i + 1
>  endwhile
>
> I repeat these commands in the same script over and over, only changing
> the second line (ex. the next one would read 'open
> /data2/control/Region01_ART_mask_GLDAS.nc'). The data is output perfectly
> when I have six masks in the script, but when I include the seventh, the
> data output from the third mask / block of commands is altered, and I get
> the following error:
>
> QUERY FILE Error:  file 2 not open
> Data Request Error:  File number out of range
>   Variable = rainfsfc.2
> Operation Error:  Error from maskout function
> Operation Error:  Error from aave function
>   Error ocurred at column 1
> DISPLAY error:  Invalid expression
>   Expression = aave(maskout(rainfsfc.2*86400,
> lterp(mask.1(time=00z01jan1948),rainfsfc.2)),lon=-179.5,lon=
> 179.5,lat=-89.5,lat=89.5)
> t=703
> Data Request Error:  File number out of range
>   Variable = rainfsfc.2
> Operation Error:  Error from maskout function
> Operation Error:  Error from aave function
>   Error ocurred at column 1
> DISPLAY error:  Invalid expression
>   Expression = aave(maskout(rainfsfc.2*86400,
> lterp(mask.1(time=00z01jan1948),rainfsfc.2)),lon=-179.5,lon=
> 179.5,lat=-89.5,lat=89.5)
>
>
> I don't believe the error lies within the third mask file itself because
> it plots fine when it is run independently from the other masks. I also get
> the same output issue when I run, for example, masks 50-56 (one or two of
> these will come up with the error, but running masks 50-55 will yield no
> problems).
>
> Any help would be appreciated to me solve this issue, as I'm baffled.
>
> -Justin
>
> --
> *Justin Hicks*
>
> *UndergraduateAtmospheric Sciences Major*
>
> *GIS MinorUniversity of Maryland-College Park*
>
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>
>


-- 
Jeff Duda
Post-doctoral research fellow
University of Oklahoma School of Meteorology
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