Originally posted by: SystemAdmin

Hello,

I have one 2D and one 3D boolean arrays that I defined as:

typedef IloArray<IloBoolVarArray> ArrayVar2D; typedef IloArray<IloArray<IloBoolVarArray> > ArrayVar3D;

and

IloEnv env; IloModel model(env); IloCplex cplex(env);

and

ArrayVar2D yir (env, 10); ArrayVar3D wijr (env, 10); 

for (

int a=0; a<10; a++) 
{ xij[a] = IloBoolVarArray(env, 10); yir[a] = IloBoolVarArray(env, 10); wijr[a] = ArrayVar2D(env, 10); 

for (

int b=0; b<10; b++) 
{ wijr[a][b] = IloBoolVarArray(env, 10); 
} 
}

It compiles, and CPLEX solves the model. My Problem: when I try to get the values. The code:

for (

int b=0; b<10; b++) 
{ 

for (

int a=0; a<10; a++) 
{ cout << 
"\t" << cplex.getValue(yir[b][a]); 
} cout << endl; 
}

Works fine. But I couldn't get the results from the 3D matrix. The code:

for (

int c=0; c<10; c++) 
{ cout << 
"c="<<c<<endl; 

for (

int b=0; b<10; b++) 
{ cout << 
" "<<b; 

for (

int a=0; a<10; a++) 
{ cout << 
"\t" << cplex.getValue(wijr[b][a][c]); 
} cout << endl; 
} 
}

Gives me:

Error: IloExtractable 11 IloNumVarI has not been extracted by IloAlgorithm 0x9848ab0

Does anyone have any idea?

Thanks!!!
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#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

This error occurs if you attempt to query the value of a variable that is not part of the model, i.e., the variable does not appear in the objective function or any constraint.
You should double-check that all variables in the 3D array actually appear somewhere in the model.
You can explicitly add the variables to the model:

for (int c=0; c<10; c++) {
  for (int b=0; b<10; b++) {
    for (int a=0; a<10; a++) {
      model.add(wijr[b][a][b]);
    }
  }
}

When you do that you can query any of the variables in the 3D array and should no longer get that error.
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#OPLusingCPLEXOptimizer

Originally posted by: m_adel

Hi,

I have a sort of similar problem with a 3d array. I would appreciate if you could give me a hint. I have defined my 3d array as follows:

 

typedef IloArray<IloNumVarArray>  IloNumVarArray2;
typedef IloArray<IloNumVarArray2>  IloNumVarArray3;  

 

IloNumVarArray3 x2(env);
    for(ii=0;ii<SampSize;ii++){
            for (i = 0; i < N_Path; i++) {
                x2[ii][i].add(IloNumVarArray(env,full_depth, 0.0,1.0,ILOINT));
        }
    }

 

Then I get the following error:

Unhandled exception at 0x00828680 in Simple Test.exe: 0xC0000005: Access violation at location 0x0000000000828680.

I can see that the problem is related to the definition of my array but can not detect the problem with it. I would be thankful if you give me a hint.

Thanks,

#DecisionOptimization
#OPLusingCPLEXOptimizer

The problem is that x2[ii] is never initialized. I think the correct initialization is this:

IloNumVarArray3 x2(env);
for(ii=0;ii<SampSize;ii++){
   x2.add(IloNumVarArray2(env));
   for (i = 0; i < N_Path; i++) {
      x2[ii].add(IloNumVarArray(env,full_depth, 0.0,1.0,ILOINT));
   }
}

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: m_adel

Hi Daniel,

Thank you so much I see your point. I solved it with another similar definition as bellow:

    IloNumVarArray3 x2(env,SampSize);
    for(ii=0;ii<SampSize;ii++){
        x2[ii]= IloNumVarArray2(env, N_Path);
        for (i = 0; i < N_Path; i++) {
            x2[ii][i]=IloNumVarArray(env,full_depth);
            for(j=0;j<full_depth;j++){
                x2[ii][i][j]= IloNumVar(env, 0.0, 1.0, ILOINT);
            }
        }
    }

Again many thanks for your answer.

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: Minoo

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi

range i=1..10;
range j=1..5;
range k=1..3;

dvar boolean X[i][j][k];

subject to
{
forall(p in i)
      {
         sum(q in j)sum(u in k)X[p][q][u] <= 1;      
      }

//2-
forall(p in i, q in j)
      {
         sum(u in k)X[p][q][u] <= 1;      
      }

//3-
forall(p in i, q in j, u in k)
      {
         X[p][q][u] <= 1;      
      }
      
    }     

works fine

 

regards

 

https://www.linkedin.com/pulse/making-decision-optimization-simple-alex-fleischer/

 

 

 

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