On Tue, Nov 2, 2010 at 2:03 PM, <razmjoo...@faunalia.co.uk> wrote: > Dear all > > Is there a limit on the number of rasters for r.patch?
How funny, we had the same question at the same time... :) >From GRASS 6.4+ there is no more limit despite the limit of open files per process (which depends on the operating system; for Linux it is usually 1024 files). To increase that: The limit of open files per process was reached (64bit Linux: 1024 files; ulimit -n) To overcome this limit, the "nofile" parameter needs to be increased in the /etc/security/limits.conf file. Here an increase to 1500 files (use * instead of neteler to aply it to all users): #<domain> <type> <item> <value> neteler hard nofile 1500 -------------------- But myself, I got troubles when having registered the maps with r.external: GRASS 6.4.1svn (patUTM32):~ > r.patch in=`g.mlist type=rast pattern=dtm00* sep=comma mapset=dtm_1m_external` out=dtm_trentino_2m ERROR 1: TIFFOpen:/geodata/base_cartography/pat_DTM_LIDAR_2007_UTM_WGS84/geotiffs/dtm000501.tif: Too many open files WARNING: Unable to open '/grassdata/patUTM32/dtm_1m_external/cell_misc/dtm000501/f_format' WARNING: quantization file [dtm000501] in mapset [dtm_1m_external] missing WARNING: Unable to open raster map <dtm000...@dtm_1m_external> ERROR: One or more input raster maps not found So far I could not find out the reason. Here I am using 500 files registered with r.external. Help welcome, Markus _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user