Originally posted by: joaopedrosantos

Beginner here, why is this happening?

range grupos = 1..Ngrupos;
range weeks = 1..Nweeks;
...

float ms[weeks];//mínima carga
float Ms[weeks];//máxima carga

dexpr float dif=sum(w in weeks) w1*(Ms[w]-ms[w]);

minimize dif;

Error on the last line and I think in the dexpr

Hi,

you have not declared w1.

int Ngrupos=2;
int Nweeks=4;

range grupos = 1..Ngrupos;
range weeks = 1..Nweeks;

float ms[weeks];//mínima carga
float Ms[weeks];//máxima carga

dvar float w1 in 0..10;

dexpr float dif=sum(w in weeks) w1*(Ms[w]-ms[w]);

minimize dif;

works fine

regards