Distribution History, Changes and Updates

The latest version of the current distribution is always available at the download page, for older distribution please follow this link. A maintenance release (MR) covers the latest distribution and platforms and includes all changes and fixes for the current distribution. Public Beta systems are early releases of a distribution, which should be used by experienced users for testing only and not in a production environment. A beta system is only available during a short period and does not require maintenance to be up-to-date (for four weeks from the beta release date).

If necessary we also publish incremental updates for certain components and platforms. Please contact support@gams.com if you need an update for other platforms. If your system needs an incremental update, download it, place it into your GAMS system directory, and install the update. For detailed information please visit: How to install a GAMS update.

• 18 August, 2010 - Distribution 23.5.2 (MR) is available at the Distribution Download Area:
  • AlphaECP: Fix for crash running under IDE
  • API: Updated Python and Java APIs and examples
  • Baron: Fixed issue with output formatting under Linux
  • Baron: Memory leak when using BARON with external NLP solver
  • Gdxmerge: Do not use path when checking for merged.gdx
  • Gurobi: Fixed typo for option displayinterval
  • McCarl Guide: Updates for 23.5
  • Mosek 6 rev 85 libraries
  • MPS2GMS: Removed mps2gms debug message
  • Snopt: Fix for wrong return code (local,global)
  • Xlsdump utility added
• Files size, MD5-Hash values and names:

md5deep -rzb *
  70473023  f92dc0131f7b8459c259345ddd55d130  aix_ppc_64_sfx.exe
 160538762  cbe66513ab38e145e79b2c57345d0482  linux_x64_64_sfx.exe
 137477547  41d3af676c05c1e1ec39ca10bb4234c4  linux_x86_32_sfx.exe
  70576301  814c0b5b1e3d2c32f4f8d31bbd55180f  osx_ppc_fat_sfx.exe
  86896446  bbb8fa1a05f3210ffe78daa8e32bea48  osx_x64_64_sfx.exe
  86617445  57e9d71c0c1188665c2ae039c4046f13  osx_x86_32_sfx.exe
      2537  1132900510a25c33f644069ed8dbb58b  README.TXT
   3087073  a2c34ef837b8c2c43fef5b4e09c86584  sun_sogms57.zip
   3086937  b9a65c23bebe049acfa253ba83c53526  sun_sogms58.zip
 113511549  84208111d806c898410b2df7089a0485  solaris_sparc_32_sfx.exe
 121571898  4c1a8d013018d1b43d1e75f81d96be90  solaris_sparc_64_sfx.exe
  90018080  6a1b7c5e6854e53312a37f8047ae2d19  solaris_x64_64_sfx.exe
  83836689  a5ff1a4c567caa06a00c67f6e75778fd  windows_x64_64.exe
  70608181  bc24c052335e8a497676861d9ec8ab9f  windows_x86_32.exe
  

• 04 July, 2010 - Distribution 23.5.1 is available at the Distribution Download Area

• 24 May, 2010 - Distribution 23.4.3 is available at the Distribution Download Area
• 11 May, 2010 - Released new Public Beta Distribution 23.4.1 with minor fixes.
• 01 May, 2010 - Released Beta Distribution 23.4.0.

• 17 Dec, 2009 - Released Distribution 23.3.3 (MR):
  • MOSEK 6 rev 55 library with bug fixes
  • 32bit HAR utilities available in 64bit Windows System
  • Slow solution reporting in GAMS/Gurobi and other solvers fixed
• 23 Nov, 2009 - Mac OS X only: Bug fix for COINOS
• 18 Nov, 2009 - Released Distribution 23.3.2 (MR).
  • Gurobi 2.0.1 library with bug fixes
  • MOSEK 6 rev 53 library with bug fixes
  • Updated CoinOS library with bug fixes
  • Solver optfile bug fix in GAMSCHK
  • Synchronized tolproj (1e-8) option for solvelink=3
• 01 Nov, 2009 - Released Distribution 23.3.1
• 10 Oct, 2009 - Released a Public Beta

• 14 Aug, 2009 - Released Distribution 23.2.1

• 23 Jul, 2009 - Released Distribution 23.1.2 (MR):
  • MPSGE: MPSGE ignored the m.workspace and m.workfactor settings
  • GAMSCHK: Fixed a problem with the layout of the reports in some models
• 13 Jul, 2009 - Released Distribution 23.1.1
• 21 Jun, 2009 - Released a Public Beta

• 14 Feb, 2009 - Released Distribution 23.0.2
• 21 Jan, 2009 - Released a Public Beta

• 01 Dec, 2008 - Released Distribution 22.9.2 * 04 Nov, 2008 - Released a Public Beta ===== 22.8 ===== * 01 Aug, 2008 - Released Distribution 22.8.1 * 14 Jul, 2008 - Released a Public Beta ===== 22.7 ===== * 13 May, 2008 - Released Distribution 22.7.2 (MR)
  • DICOPT/ALPHAECP/LOGMIPLBOA: Fixed Cplex scaling bug
  • GAMS/CPLEX: Small cosmetic Cplex bug fix. We got “CPLEX Error 3003: Not a mixed-integer problem.” In case we cannot solve the fixed problem. This was due to some query calls about nodes and iteration.
  • GAMSIDE: Fixed a bug that could cause an out of memory error when moving a row or column to the plane index in the gdx data viewer
  • GAMS/DEA: Avoid writing zeros to GDX files
  • GAMS/LGOLIB: Fixed a memory leak
  • Minor documentation updates
  • Note: AIX and Mac OS X PPC were not updated, please contact support for further information
• 25 Apr, 2008 - Released Distribution 22.7.1
• 03 Apr, 2008 - Released a Public Beta

• 27 Feb, 2008 - GAMS/DECIS (incremental Windows 32 bit Update): There was an error in the initialization of the GAMS/DECIS solver that caused it to fail. The updater fixes this issue.
• 22 Jan, 2008 - gdxmerge.exe (incremental Windows 32 bit Update, Windows 64 bit Update, Linux 32 bit Update, Linux 64bit Update): The gdxmerge utility had a problem when merging aliases.
• 09 Jan, 2008 - Updated Distribution, which includes all previous updates and fixes.
• 09 Jan, 2008 - Linux 32bit: Intel Compiler issue.
• 08 Jan, 2008 - Linux 64bit (incremental Linux 64 Update): gamslib and testlib still required the setting of the LD_LOAD_LIBRARY environment variable.
• 07 Jan, 2008 - Updated Distribution Download, which includes all previous updates and fixes
• 07 Jan, 2008 - gdx2access.exe (incremental Windows Update): The executable had some initialization problems.
• 07 Jan, 2007 - Linux 64bit: System required setting of the LD_LOAD_LIBRARY environment variable.
• 23 Dec, 2007 - Released Distribution 22.6
• 06 Dec, 2007 - Released a Public Beta

• 01 Jul, 2007 - GAMS/CONOPT (incremental Windows 32bit Update, Linux 32bit Update, Linux 64bit Update): GAMS/CONOPT did not terminate on some problems. This was a tolerance issue, which has been fixed.
• 01 Jul, 2007 - GAMS/CoinCbc (incremental Windows Update): The GAMS/CoinCbc executable had a difficulty to reproduce problem in the B&B part on Windows. The Cbc source was taken from the development branch. The update includes a new Cbc build with the stable version of Cbc.
• 01 Jul, 2007 - GAMS/CoinIpOpt (incremental Windows Update): The GAMS/CoinIpOpt executable had a rare occurring problem in the solver part (MUMPS) on Windows.
• 01 Jul, 2007 - GAMS/CPLEX (incremental Windows 32bit Update, Windows 64bit Update): The interactive option in GAMS/CPLEX terminated the solver job after supplying an option. This has been fixed in the option processing unit. Contact us for other platforms.
• 01 Jul, 2007 - GAMS/CPLEX (incremental Windows 32bit Update): Sometimes the solution of the fixed problem of a MIP does not solve to optimality due to small (dual) infeasibilities. The default behavior of the GAMS/CPLEX link is to return the primal solution values only. If the new option relaxfixedinfeas is set to 1, the small infeasibilities are ignored and a full solution including the dual values are reported back to GAMS.
• 01 Jun, 2007 - Released Distribution 22.5
• 26 Apr, 2007 - Released a Public Beta