We have an
AMPL/CPLEX prototype model using the substout option for which the actual CPLEX
solve executes in x minutes.
For a variety of
reasons, we need to have a Java/CPLEX (Concert) software
implementation. We've created that and we get exactly the same
results between AMPL/CPLEX and the Java/CPLEX (Concert), out to several decimal
places. Great.
But the Java/CPLEX
version solve step executes in 4x or 5x minutes, far slower than the CPLEX
solve when prepared from AMPL.
AMPL's substout is
apparently doing a fantastic job of reducing the problem size for CPLEX to solve
and its really helping our runtimes. Great for
AMPL!
I know this is an
AMPL group, but I was just wondering if anyone knows if there is some comparable
capability in CPLEX to AMPL's substout that can be invoked through Concert from
Java.
Thanks.
Ron
Menich
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