[GRASS-dev] r.series with file option - too many files open

Anna Petrášová kratochanna at gmail.com
Mon Jan 15 07:32:27 PST 2018

On Mon, Jan 15, 2018 at 10:12 AM, Paulo van Breugel
<p.vanbreugel at gmail.com> wrote:
> Hi devs,
> I am trying to run r.series with a large number of input maps (5000). Given
> the large number of input maps, I am using the 'file' option.
> GRASS 7.5.svn (latlon):~ > r.series output=speciescount method=sum
> file=test.txt
> I get the warning:
> WARNING: G__open(read): Unable to open
>          '/home/paulo/Data/HASdata/latlon/redlist/cellhd/Eulemur_fulvus':
>          Too many open files
> ERROR: Error reading reclass file for raster map <Eulemur_fulvus>
> Eulemur_fulvus is the 511th file on the list. From the help file, I thought
> that using the file option will prevent one from hitting open files limit
> and the size limit of command line arguments. Am I misunderstanding the
> r.series helpfile?

You should probably use -z flag (do not keep files open), but I can
see it's not mentioned in the manual.

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