[GRASS-dev] [GRASS GIS] #2036: Failed watershed analysis on Grass

[GRASS GIS]

#2036: Failed watershed analysis on Grass
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  Reporter:  mehmeto      |       Owner:  grass-dev@…              
      Type:  defect       |      Status:  closed                   
  Priority:  normal       |   Milestone:  6.4.4                    
 Component:  Raster       |     Version:  6.4.2                    
Resolution:  fixed        |    Keywords:  LFS, r.watershed         
  Platform:  MSWindows 7  |         Cpu:  x86-64                   
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Comment(by hamish):

 this isn't really that large of a region, you usually hit 2 GB files at ~
 45000x45000 rows x cols. this is much smaller,

 {{{
 rows:       7350
 cols:       8166
 }}}

 >> ERROR: G_calloc: unable to allocate 4 * 60175190 bytes at main.c:91

 (devs: should we strip the wingrass binaries in the stable release builds?
 or keep the line number code there for better debugging?)


 > If you calculate 4 * 60175190 bytes = 240700760 which is > 2^31.

 missed a 0, actually it's 9 times smaller than 2^31. It only wants to
 allocate 241mb RAM, so probably not a large-file problem. How much do
 memory does your computer have?


 for what it's worth, some LFS notes: In GRASS 6.4 it is enabled module by
 module for those that need it. We know the list of modules which might
 need it, and intend to fully audit that for 6.4.4.  WinGrass is built
 using the OSGeo4W stack and the MSys software, both of which are currently
 32bit with 64bit versions in current development. Once we have those 64
 bit build platforms in place a 64 bit version of WinGrass will be
 available as it is on MacOS and Linux already.


 Hamish

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Ticket URL: <http://trac.osgeo.org/grass/ticket/2036#comment:7>
GRASS GIS <http://grass.osgeo.org>