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ChangeLog
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ChangeLog
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2006-10-01
* Fixed bug in memory allocation for array min_phi in PCx.c
2004-11-05
* Fixed hash.c to allow more than 1.3 million rows and columns;
* redefined allowable hash table sizes.
2004-03-19
* Fixed minor bugs concerning handling of upper bounds (in PCx.c) and
scaling (in scale.c).
* Unified the unix and Matlab-ready distributions.
2003-05-11
* Updated PCx-C (C version) to use latest version of fortran-to-C
utility f2c.
2003-04-11
* Fixed another bug in preprocessor, again concerning row singletons.
2002-02-28
* Fixed bug in preprocessor for bounded variables in a singleton row.
2002-02-26
* Updated PCx-AMPL interface to fix some bugs in the interface, and
document the installation process more thoroughly.
* Also created precompiled executables for Intel Solaris, Sun Solaris,
and Linux.
2001-12-23
* Fixed handling of "MI" in the BOUNDS section of MPS files; affects
only cases in which MI variables have upper bounds other than 0.
2001-02-27
* A few fixes in line search heuristic and MPS file handling; affects
only a few cases.
2000-12-14
* Fixed readmps.c to avoid core dumping on incorrect MPS input files.
1999-09-13
* Bug fix in PCx Unix and C versions.
* Bug affected instances with bound constraints in whch Gondzio
correctors were used.
1999-08-12
* Unix and C versions changed to accept problems with zero rows in the
constraint matrix, and to improve efficiency of initial matrix ordering
routines. (We are working on improvements to the dense column handling,
which will be released shortly.)
1998-08-06
* AMPL interface and PCxGUI (Java interface) released.
1998-06-10
* Added DOS version 1.1, unified parameter.c for DOS, Unix, all-C
versions
1998-03-10
* PCx 1.1 for Windows - parameter file bug fixed
1998-03-01
* 2 minor memory bugs fixed, new linux version built
1998-01-26
* PCx 1.1 for Windows released
1997-12-08
* Computational results added for WSSMP and Ng-Peyton versions
1997-11-02
* Release of version 1.1:
* Includes hooks to incorporate alternative linear equations solvers,
including WSSMP
1997-10-20
* Fixed a few bugs in documentation
1997-09-22
* Fixed various leaks and changed input routine to always seek MPS file
in current directory first
1997-08-18
* Fixed various minor leaks and bugs
* Provided cleaner interface to sparse Cholesky solvers
1997-06-25
* Some memory leaks corrected
1997-03-07
* Release of version 1.0:
* Includes higher-order corrections, scaling, bug fixes.
1996-11-25
* New ComputeADAT routine: greatly improves efficiency on some problems
1996-10-18
* Release of version beta-2.0:
* Includes dense column handling, many memory leak and bug fixes.
1996-07-09
* Fixed bug in presolve.c
1996-05-28
* Added #include stdlib.h to readmps.c for Linux
1996-05-17
* Added Solaris executable and timing code
1996-05-15
* Initial Release: version beta-1.0