Originally posted by: SystemAdmin

[nfan said:]

I used following codes in C++ to define high dimensional integer and continuous variables. However, I always got the error
"Segmentation fault".

But when I change all variables into binary integer form, there is no such error.

what is wrong with my definition of variables? I want to define x[i][j] to be binary and y[i][j][k] to be continuous variables.

Thanks,

    [i]typedef IloArray<IloNumVarArray> IloNumArray2;
    typedef IloArray<IloNumArray2> IloNumArray3;

typedef IloArray<IloBoolVarArray> IloBoolArray2;

//define binary integers x[i][j] with dimension N*N
        IloBoolArray2 x(env,N+1);
for(i=1;i<=N;i++){<br /> x[i]=IloBoolVarArray(env,K+1);}

//define continuous variables y[i][j][k] with dimension N*N*K
IloNumArray3 y(env,N+1);
for(i=1;i<=N;i++){<br /> y[i]=IloNumArray2(env,N+1);
for(j=1;j<=N;j++){<br /> y[i][j]=IloNumVarArray(env,K+1);}}[/i]
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#DecisionOptimization

Originally posted by: SystemAdmin

[prubin said:]

For future reference, please avoid using subscript i -- the forum software thinks an i inside square brackets means "commence italics".

[quote author=nfan link=topic=1417.msg3991#msg3991 date=1255961765]
I used following codes in C++ to define high dimensional integer and continuous variables. However, I always got the error
"Segmentation fault".

But when I change all variables into binary integer form, there is no such error.

what is wrong with my definition of variables? I want to define x[h][j] to be binary and y[h][j][k] to be continuous variables.

Thanks,

    [i]typedef IloArray<IloNumVarArray> IloNumArray2;
    typedef IloArray<IloNumArray2> IloNumArray3;

typedef IloArray<IloBoolVarArray> IloBoolArray2;

//define binary integers x[h][j] with dimension N*N
        IloBoolArray2 x(env,N+1);
for(h=1;h<=N;h++){<br /> x[h]=IloBoolVarArray(env,K+1);}

//define continuous variables y[h][j][k] with dimension N*N*K
IloNumArray3 y(env,N+1);
for(h=1;h<=N;h++){<br /> y[h]=IloNumArray2(env,N+1);
for(j=1;j<=N;j++){<br /> y[h][j]=IloNumVarArray(env,K+1);}}[/i]


Do you get the seg fault in this block of code, or when you go to use y?  I note that you are leaving y[0] and y[h][0] undefined; I wonder if the seg fault is actually the result of a null pointer being used later?

/Paul
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

[nfan said:]

The errors appear when I use y. Although I add y[0] and y[h][0] to be defined, which I actually never used in the following, the errors still appear when I use y in the following.

But when I change y to be binary, the error does not appear. I want y to be continuous not binary.

Thanks a lot,
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

[nfan said:]

Thanks. Finally I fixed this error by the following:

IloNumArray2 x(env,N+1);
for(h=0;h<=N;h++){<br /> x[h]=IloNumVarArray(env,K+1,0,1,ILOINT);}

//define the decision variables y[h][j][k]
IloNumArray3 y(env,N+1);
for(h=0;h<=N;h++){<br /> y[h]=IloNumArray2(env,N+1);
for(j=0;j<=N;j++){<br /> y[h][j]=IloNumVarArray(env,K+1,0,IloInfinity,ILOFLOAT);}}
#CPLEXOptimizers
#DecisionOptimization