[GRASS-user] G_malloc error

Glynn Clements glynn at gclements.plus.com
Mon Oct 29 10:27:04 PDT 2012

Benjamin Ducke wrote:

> If you want GRASS to use more than 3.5GB of RAM,
> then you need to run a 64 bit operating system.
> Otherwise, no single application will get to see
> more than 4GB. Also check your motherboard's manual
> to see how much RAM it supports. Often, there are
> limits of 16, 32 or 64GB total.
> If you plan to use 64 bit Windows, then be aware
> that Microsoft has put arbitrary limitations re.
> usable RAM into each one of there many different
> release versions. E.g. a Windows Home license might
> not be able to use more than 8GB.

Also, we don't currently provide 64-bit GRASS binaries for Windows, so
you'd need to build it from source with a compiler that can produce
64-bit executables (and you'll need 64-bit versions of all of the
relevant libraries).

The last time I checked, MingGW-64 was still quite unstable, although
I don't know if that has changed since. The build system doesn't
support compiling with MSVC (and the free edition doesn't support
building 64-bit binaries).

Glynn Clements <glynn at gclements.plus.com>

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