PC GAMESS/Firefly-related discussion club

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Alex Granovsky
gran@classic.chem.msu.su

The maximum amount of memory available to
PC GAMESS/Firefly under any version of Windows
via MWORDS or MEMORY variables is about or less than
2 GB (i.e., 268 MWORDS maximum, as word is 8-byte value).
This does not mean that PC GAMESS is limited to 2 GB of RAM
under any Windows, it can use and typically uses more memory
if needed; however this memory is not used directly for
calculations but rather servs as the pool for varius I/O
buffers, BLAS level 3 working storage, etc...

Be careful to not allocate more memory (via MWORDS)
than you have physically installed on your system!

Regards,
Alex


On Sat Nov 29 '08 12:32pm, Pasquale wrote
-----------------------------------------
>Hi,
>I run PC GAMESS/Firefly on a dual core machine with Windows XP 64bits (but using only 1 cpu) having 1GB of RAM and a pagefile of 4GB. If I set MWORDS to a value grater than 268, I get an error saying that the memory is unavailable. (Under XP 32 bits, I found similar limit, but around 240 MWORDS). I increased also the RAM to 2GB, but I got the same error.

>What can I do?

>Regards