[GRASS-user] r.patch number of input limitation?

Robert Kuszinger kuszinger at giscom.hu
Wed Sep 24 06:52:31 PDT 2014

Dear Markus,

great, it works. I've reconfigured the workstation and now it runs...

 I've also read the others tips there which are all great.

Vaclav: let me answer... I think this error message is from the underlying
OS which is hard to classify and comment with a good hit rate, especially
in cross-OS systems. File number limitation may cause a "file cannot open"
and depending on developer frameworks - not only GRASS - it is not easy to

Thanks all to you for the fast help!


2014-09-24 15:38 GMT+02:00 Vaclav Petras <wenzeslaus at gmail.com>:

>> It is indeed the operating system which limits the number of open
>> files. For Linux, it is likely 1024 files.
>> I have now added a note to the manual of r.patch (using those of
>> r.series).
>> Would it be possible to provide some possible reasons/suggestions in the
> error message? (the wording should be that it is "possible reason")
>> For a solution, see also
>> http://grasswiki.osgeo.org/wiki/Large_raster_data_processing#Number_of_open_files_limitation
>> You can increase this limit.
>> Hope this helps,
>> Markus
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