21.7 Major release (April 01, 2005)

Acknowledgements

We would like to thank all of the users who have reported bugs or made suggestions in improving this release.

New platforms supported

  • 64 bit x86_64 (Linux) version introduced. Linux licensing includes both 32 and 64 bit at a single platform cost. Some solvers exist only in 32 bit mode and are included as 32 bit on the 64 bit version. See the solver platform matrix below.

  • Macintosh PowerPC (Darwin) version introduced.
See our sales page for available solvers by platform.

GAMS System

  • MODEL LIBRARY:

  • NEW WORKFILE FORMAT:
    • now a single file (G00 file extension). Files can be read that were created on different platforms. File is packed and only approx 50% of previous file size. Read and write is also substantially quicker.

  • TESTLIB LIBRARY:
    • Updates to quality model
      • take advantage of solver updates & fixes
      • added --QUICK=1 option to skip slow tests
      • test all solvers, using system.solverNames and filter list
      • allow skips of models in solver-specific test suites
    • New models
      • convert solver test suite
      • new cmex & MIP tests, test new workfile format save/restart
      See the testlib library for details.

Solvers

  • BARON: New libraries (version 7.2.5) which address minor bug fixes and enhancements.

  • BENCH: promoted from beta solver.

  • GAMS/AMPL Link: a GAMS/AMPL link has been introduced.

  • GAMS/LINGO Link: a GAMS/LINGO link has been introduced.

  • MOSEK: New libraries (version 3.2) which address minor bug fixes and enhancements.

  • NLPEC:
    • Relaxed the test for complementarity of the solution proposed by the reformulated model to work better for poorly-scaled models

  • XA:
    • update to documentation (nodelimit, log output)
    • numerous library updates to fix outstanding issues
    • improved handling of solver status 4=TERMINATED BY SOLVER

  • XPRESS:
    • deal with "recoverable errors" on return from barrier method
    • minor improvements and workarounds for library quirks in link

Solver/Platform availability - 21.7
  Intel
MS Windows
x86_64
Linux
Intel
Linux
Sun Sparc
SOLARIS
HP 9000
HP-UX 11
DEC Alpha
Digital Unix 4.0
IBM RS-6000
AIX 4.3
SGI
IRIX
Mac PowerPC
Darwin
BARON 7.2 32bit          
BDMLP
COIN          
CONOPT 3
CPLEX 9.0 8.1  
DECIS  
DICOPT
KNITRO 4.0 32bit            
LGO  
MILES
MINOS
MOSEK 3.2      
MPSGE
MSNLP    
OQNLP 32bit            
OSL V3 32bit V2   V2  
OSLSE 32bit        
PATH
SBB
SNOPT
XA 32bit    
XPRESS 15.25 32bit 15.20   15.20