Originally posted by: SongYang

Hi all,
I am a fresh man on it. Now I want to access the decision variables in my codes of Java, but it reports that " Type dvar int expected for element "b". Here is my code ,it is very simple, but I just can not figure it out. Can you help me, thanks in advance!!!

IloOplFactory.setDebugMode(true);
IloOplFactory oplF = new IloOplFactory();

IloOplErrorHandler errHandler = oplF.createOplErrorHandler(System.out);
IloOplSettings settings = oplF.createOplSettings(errHandler);

IloOplModelSource modelSource = oplF.createOplModelSource("D:/songyang/opl/Test/test3.mod");

IloOplModelDefinition def = oplF.createOplModelDefinition(modelSource,settings);
IloCplex cplex = oplF.createCplex();
IloOplDataSource dataSource= oplF.createOplDataSource("D:/songyang/opl/Test/test3.dat");
IloOplModel opl = oplF.createOplModel(def, cplex);
opl.addDataSource(dataSource);

double objective_result;

IloOplRunConfiguration rc = oplF.createOplRunConfiguration(opl.getModelDefinition(), opl.makeDataElements());
rc.getCplex().setOut(null);
rc.getOplModel().generate();

IloOplDataElements myData;
IloOplElement DeVariable;

if (rc.getCplex().solve())
{
objective_result = rc.getOplModel().getCplex().getObjValue();

myData=rc.getOplModel().makeDataElements();

DeVariable=rc.getOplModel().getElement("b");
IloIntMap DeData=DeVariable.asIntMap();
int opx=DeData.get(1);

System.out.println(opx);
System.out.print("The optimum value is:");
System.out.println(objective_result);
BufferedWriter bw = new BufferedWriter(new FileWriter("D:/songyang/opl/Test/result111.txt"));
String str=String.valueOf(objective_result);

bw.write(str);

bw.close();
}
else
{
System.out.println("No solution!");
System.out.flush();
}

rc.end();
rc = null;
}catch( Exception e) {

e.printStackTrace();
}
#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

I think the problem from the fact that you try to directly transform an array of variables intro an array of ints.

DeVariable=rc.getOplModel().getElement("b");
IloIntMap DeData=DeVariable.asIntMap();
int opx=DeData.get(1);

should perhaps be written as

DeVariable=rc.getOplModel().getElement("b");
IloIntVarMap DeData=DeVariable.asIntVarMap();
int opx=DeData.get(1);

or

DeVariable=rc.getOplModel().getElement("b");
IloIntVarMap DeData=DeVariable.asIntVarMap();
IloIntVar opx=DeData.get(1);
int x = rc.getOplModel().getCplex().getValue(opx);

#DecisionOptimization
#OPLusingCPLEXOptimizer