The AMPL processors and solvers in this directory are "student"
versions that restrict problem sizes (to 300 variables and 300 general
constraints) and are intended for noncommercial use. For serious
commercial use, you should (eventually) license commercial versions,
even if your applications never exceed the limits of the student
versions.
See the AMPL web site
http://www.ampl.com
for extensive information about AMPL, including descriptions of
extensions available in current versions and pointers to information
about other solvers.
Files with names ending in ".gz" were compressed by gzip, and
cplex.tgz is a tar file compressed by gzip and containing both a
LICENSE file and a cplex binary. In general, you need to decompress
the *.gz files and make them executable. For example, you could
execute
gzip -dN ampl.gz cplex.tgz lpsolve.gz minos.gz
tar xf cplex.tar
chmod +x ampl cplex lpsolve minos
rm cplex.tar
You may also need to move the files (using "mv" or "cp") to a
directory on your search PATH.
File ampl is a student version of the AMPL processor.
File cplex is a student version of CPLEX 7.1 (for use with ampl).
For pointers and more details, see files README.1st, README.cplex, and
ampl70.pdf in directory /netlib/ampl/solvers/cplex.
Please note that ampl70.pdf refers to "cplexamp" rather than "cplex".
Unrestricted versions of cplex sold by ILOG/CPLEX are called
"cplexamp" when delivered. You are free to name things as you wish
(with suitable changes to "option solver" lines in AMPL scripts if
necessary). One approach that avoids changes to AMPL scripts is to
call the interactive CPLEX front end provided by ILOG/CPLEX "icplex"
rather than "cplex", and to use "cplex" for the solver that works with
AMPL.
File gjh computes gradients, Jacobian matrices and Hessians of
nonlinear problems and makes them available to AMPL as parameters.
File minos is a student version of MINOS (for use with ampl).
For pointers and more details, see files README.1st and README.minos
in directory /netlib/ampl/solvers/minos and see web page
http://www.ampl.com/REFS/abstracts.html#ampl-minos .
File lpsolve is a solver based on lp_solve, an LP and MIP
solver by Michel Berkelaar. For pointers and more details, see
/netlib/ampl/solvers/lpsolve/README.
File snopt is a student version of SNOPT (for use with ampl). For
pointers and more details, see file README in directory
/netlib/ampl/solvers/snopt.