Re: [Help-glpk] syntax error in literal set

[Andrew Makhorin]

> I'm just getting into GLPK....I can't get past the syntax error in literal 
> set 
> idetnified in line 25 where the constraint is defined....any help would be 
> much appreciated....I'm sure I have problems after getting over that issue 
> too:)

[...]
>      
> /* Constraints */
> s.t. WORKDAYCONSTRAINT{j in SITES}:sum{i in TECHNICIANS, j in SITES, k in 
> GOODWEATHERDAYS} y[i,j,k] <= sum{j in SITES} DAYSOFSITEWORK[j]; 

Dummy index j is already defined in the scope following the colon (:),
so you should not duplicate it in the sum operator; otherwise it is
considered as a literal set { j } that leads to the error. You need to
remove 'j in SITES' either from the contraint header or from the sum
operator.