[GRASS-user] ERROR: G_malloc: unable to allocate 2147483648 bytes at main.c:153

[ikechinedu at gmail.com]

Hi, i am trying extract road network from a raster map but each time i run the image filter, i get this error message: ERROR: G_malloc: unable to allocate 2147483648 bytes at main.c:153.

i also connnot use the i.class command on my windows machine which is the platform i am working with. please how can i extract a road network from raster map on windows platform?
thank you.
Nathaniel