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Download Older GAMS Distributions

The older GAMS distributions available for ftp download are

Distribution 22.5, June 1, 2007. See the release notes
Distribution 22.4, February 12, 2007. See the release notes
Distribution 22.3, November 27, 2006. See the release notes
Distribution 22.2, April 21, 2006. See the release notes
Distribution 22.1, March 15, 2006. See the release notes
Distribution 22.0, August 1, 2005. See the release notes
Distribution 21.7, April 1, 2005. See the release notes
Distribution 21.6, January 26, 2005. See the release notes
Distribution 21.5, November 11, 2004. See the release notes
Distribution 21.4, September 6, 2004. See the release notes
Distribution 21.3, January 19, 2004. See the release notes
Distribution 21.2, September 3, 2003. See the release notes
Distribution 21.1, June 2, 2003. See the release notes
Distribution 21.0, May 15, 2003. See the release notes
Distribution 20.7, June 14, 2002. See the release notes
Distribution 20.6, May 25, 2002. See the release notes
Distribution 20.5, January 28, 2002. See the release notes
Distribution 20.4, January 21, 2002. See the release notes
Distribution 20.3, December 24, 2001. See the release notes
Distribution 20.2, November 22, 2001. See the release notes
Distribution 20.1, October 31, 2001. See the release notes
Distributions 18.0 - 20.0 are available as well, but without release notes

Please point your browser to our ftp server ftp.gams-software.com or use any ftp client to do so. The command line steps procedure (using Dist. 21.7 for Windows as an example) are as follows:

         $ ftp ftp.gams-software.com
         User: ftp
         Password: [your_email_address]
         ftp> bin 
         ftp> cd 21.0/systems/win
         ftp> get setup.exe
         ftp> exit

Please refer to the Windows Installation Notes or the UNIX Installation Notes for more information about the necessary steps to setup a GAMS system. The complete system documentation and release notes can be found online.

Without a valid GAMS license the system will operate as a free demo system with these limitations:

Model limits:

Number of constraints: 300
Number of variables: 300
Number of nonzero elements: 2000 (of which 1000 nonlinear)
Number of discrete variables: 50 (including semi continuous, semi integer and member of SOS-Sets)

Global solver limits:
- Number of constraints: 10
- Number of variables: 10

The GAMS log will indicate that your system runs in demo mode:

GAMS Rev 136  Copyright (C) 1987-2003 GAMS Development. All rights reserved
Licensee: GAMS Development Corporation, Washington, DC   G871201:0000XX-XXX
          Free Demo,  202-342-0180,  sales@gams.com,  www.gams.com   DC9999
--- Starting compilation

GAMS will terminate with a licensing error if you hit one of the limits above:

*** Status: Terminated due to a licensing error