Originally posted by: SystemAdmin

Hi,
is there an option to get all solutions of a model?
thanks in advance

NL
#ConstraintProgramming-General
#DecisionOptimization

Originally posted by: Didier Vidal

You should call the next() method of the CP engine. This is straightforward in C++, java or C#. If you do this from OPL, you have first to create a 'main' function, where you can invoke the CP engine in the non default way (ie not just solve). I have written a simple example below. You can find other similar codes in the OPL examples of the distribution.

using CP;   main 
{ var runConfig = 

new IloOplRunConfiguration(
"draft.mod"); runConfig.oplModel.generate(); runConfig.cp.startNewSearch(); 

while (runConfig.cp.next()) 
{ writeln(runConfig.oplModel.i); 
} writeln(
"All solutions found"); 
}   dvar 

int i[1..5] in 1..5;   constraints 
{ allDifferent(i); 
}

#ConstraintProgramming-General
#DecisionOptimization

Originally posted by: SystemAdmin

Thanks for your reply,

if we have data in a file we have to use the constructor

IloOplRunConfiguration(
"***.mod",
"***.dat")

I think ?!
#ConstraintProgramming-General
#DecisionOptimization

Originally posted by: Didier Vidal

Yes. By the way, you can find the signature of ILoOplRunConfiguration in the OPL documentation (ILOG Script Reference Manual) for all variations of the signature.

Didier.
#ConstraintProgramming-General
#DecisionOptimization

Originally posted by: SystemAdmin

thank you again!! :)

NL
#ConstraintProgramming-General
#DecisionOptimization