Hi Santha,
I've saw your code and could highlight some moment:
var BoxesNeeded {LegitCombo_ISN} >= 0 integer;
var Proportion {LegitCombo_ISN} >= 0 <= 1;
impvar VolumeInsideBox {i in ISN, b in BOX,m in MOL,d in T1,w in T2} = Volume_ISN[i] * Proportion[i,b,m,d,w];
impvar WeightInsideBox {i in ISN, b in BOX,m in MOL,d in T1,w in T2} = Weight_ISN[i] * Proportion[i,b,m,d,w];
In this case, you'll get some errors because you create variables only for certain subset with expression Flag=1.
I would recommend you to fix some values for variable, like that:
var BoxesNeeded {i in ISN, b in BOX,m in MOL,d in T1,w in T2} >= 0 integer;
var Proportion {i in ISN, b in BOX,m in MOL,d in T1,w in T2} >= 0 <= 1;
for {i in ISN, b in BOX,m in MOL,d in T1,w in T2: Flag[i,b,m,d,w]=1 } do;
fix BoxesNeeded {i in ISN, b in BOX,m in MOL,d in T1,w in T2}=0;
fix Proportion {i in ISN, b in BOX,m in MOL,d in T1,w in T2}=0;
end;
In this case you can set constraint correctly. Thats should be look like that:
con CYSSpecific {m in MOL, i in ISN,d in T1: m="CYS"}:
sum {b in BOX, w in T2} VolumeInsideBox[i,b,m,d,w]= Volume_ISN[i]*Is_ISN_MOL[i,m];
