optimizationschedulingcplex

# CPLEX Error: operator not available for dexpr int + dvar float[][j][l]

I am writing a code for a goal programming problem in IBM CPLEX. It gives the following error code: "operator not available for dexpr int + dvar float[][j][l]"

Here is a part of my code:

``````int N=22;
int M=30;
int T=3;
int P=3;

range I=1..N;
range J=1..M;
range K=1..T;
``````

.... ....

``````dvar boolean x[I][J][K][L];
``````

.... ....

dvar float d1minus[I][J][L]; dvar float d1plus[I][J][L];

..... .....

minimize objective;

``````subject to{

objective == sum(i in I, j in J, l in L)(d1minus[i][j][l]+d1plus[i][j][l])+sum(i in I). (d2minus[i]+d2plus[i]+d3minus[i]+d3plus[i]) ;

forall(i in I, j in J, l in L){
d1minus[i][j][l]>=0;
d1plus[i][j][l]>=0;
}

forall(i in I){
d2minus[i]>=0;
d2plus[i]>=0;
d3minus[i]>=0;
d3plus[i]>=0;
}

//10 constraints

//goal 1

forall(i in I){
sum(j in J,k in K,l in L)x[i][j][k][l]+d1minus[i][k][l]-d1plus[i][j][l]==24;
}

.............
``````

I get the error code for goal 1 (given above).

``````forall(i in I){