[GAP Forum] running with grape package under windows 64

[Alexander Konovalov]

> On 7 Jul 2016, at 07:19, R.N. Tsai <r_n_tsai at yahoo.com> wrote:
> 
> Dear GAP forum,I'm doing some calculations with gap+grape package under windows. Things work fine with the gap32 version, but grape doesn't seem to workwith gap64. The graphs I'm working with are very large and I would liketo run gap64 with 16GBytes memory. Is there a 64 bit version of grapeavailable somewhere?Thanks,R.N.

Dear R.N.,

Grape uses a stand-alone binary, so it can interact with 64-bit GAP version
even being 32-bit application. The problem is that GAP looks for the binary
for GRAPE using the architecture-dependent path which it assumes to be
'x86_64-unknown-cygwin-gcc-default64'. As a quick workaround, I suggest to
try this: in the 'bin' directory of your GRAPE installation, you should
have the directory 'i686-pc-cygwin-gcc-default32'. Copy it to the directory
'x86_64-unknown-cygwin-gcc-default64' and try to load GRAPE from 64-bit 
version of GAP now. Please let me know if this helps!

Best wishes
Alexander