1. Log on to one of the teaching machines:
lab110-5 ... lab110-18
2. Set cplex's environment variable.
If you are using tcsh or csh then your environment should
set to:
setenv CPLEXLICDIR /usr/local/pkgs/cplex/licdir
If you are using Bourne shell then your environment should
set to:
CPLEXLICDIR=/usr/local/pkgs/cplex/licdir;
export CPLEXLICDIR
3. Make sure your search path include /usr/local/bin.
4. Just type "cplex" and you should get the cplex prompt.
5. Our licence only allows 10 users at any one time.
6. Complete documentation is in the consultants office at the labs in McConnell 106.
7. A few sample cplex input files are contained in http://cgm.cs.mcgill.ca/~avis/courses/software/cplex
8. Here is a sample session on sita for the 5 queens problem:
[lab110-5.cs.mcgill.ca] cplex
Welcome to CPLEX Linear Optimizer 6.0.1
with Mixed Integer & Barrier Solvers
Copyright (c) ILOG 1997-1998
CPLEX is a registered trademark of ILOG
Type 'help' for a list of available commands.
Type 'help' followed by a command name for more
information on commands.
CPLEX> read 5queens.lp
Problem '5queens.lp' read.
Read time = 0.00 sec.
CPLEX> mipopt
Tried aggregator 1 time.
No MIP presolve or aggregator reductions.
Presolve time = 0.00 sec.
Maximum infeasibility variable selection.
Objective is integral.
Nodes
Cuts/
Node Left Objective IInf
Best Integer Best Node ItCnt
0 0
5.0000 9
5.0000 13
* 4 0
5.0000 0
5.0000
34
Integer optimal solution: Objective = 5.0000000000e+00
Solution time = 0.01 sec. Iterations = 34
Nodes = 4
CPLEX> di so va -
Variable Name
Solution Value
x12
1.000000
x25
1.000000
x33
1.000000
x41
1.000000
x54
1.000000
All other variables in the range 1-25 are zero.
CPLEX> quit
[lab110-5.cs.mcgill.ca 48]