Originally posted by: gustavgans123

Hi,

I am new to CPLEX studio and I have a problem with the model that I built.

When I run the configuration, I get the error: "Data entry "xx" was not expected for float[N][N][V]"

Basically I have 4 Nodes (N) and 1 Vehicle (V) and the constant "Ct" is supposed to be the transportation cost between node i in N and j in N for vehicle v in V.

Ct is defined like this in the .mod file:

float Ct[i in N, j in N, v in V] = ...;

and like this in the .dat file:

Ct = [0.4, 10.2,15.4,1,12.7,14.3,15,14,11,16];

I attached the .mod and the . dat file.

Any help is highly appreciated!

BR,

Gustav

Originally posted by: gustavgans123

I solved that problem, As I took out the v in V index, as v = 1 anyway at the moment. Also I changed the .dat file to:

Ct= [

[40,20,25],

[40,35,45],

[20,35,15],

];

But the objective function seems to have several issues, as I get many errors: "opl cannot extract expression "objective function". I attached the updated files.

Again, any help is highly appreciated!

BR 

Hi,

you simply have an out of bound.

If you turn

minimize sum(i in N, j in N, v in V, s in S) Ct[i,j]*y[i,j,v,s] + sum(m in M, v in V, s in S) Cit[v]*x[m,v,s] + sum(m in M, s in S) Clp[m,s]*l[m,s];

into

minimize sum(i in N, j in N, v in V, s in S:i!=0 && j!=0) Ct[i,j]*y[i,j,v,s] + sum(m in M, v in V, s in S) Cit[v]*x[m,v,s] + sum(m in M, s in S) Clp[m,s]*l[m,s];
 
 

your model will work fine

regards

Originally posted by: gustavgans123

Hi Alex,

thank you very much, that saved me a lot of time!

BR