Q: … I would like to know if this GAMS build is it self a 64 bits program? Sometimes Windows says it is a 32 bit program…

On the 64 bit GAMS system, some components are still 32 bit applications:

• gams.exe is a 32 bit application; but it calls gamscmex.exe to do the actual GAMS work which is 64 bit.
• The GAMSIDE is currently a 32 bit application.

For more information, which solver are available as 64 bit versions, please check the current supported platforms.