Originally posted by: AndyHam

I could not figure out why I have "Unbound expression" error.

// to ensure no-break during the production other than setup

forall (l in Lines, p in Plan) 
   startOfNext(seqMch[l], itvAlt[p][l],0)- endOf(itvAlt[p][l]) ==
       item(Setup_Product, <p.p,typeOfNext(seqMch[l],  itvAlt[p][l], p.p, p.p)>).t; 
Unbound expression: item(Setup_Product_adj,<p.p,typeOfNext(seqMch[l],itvAlt[p][l],p.p,p.p)>).t.

Please help me. Thanks,

Originally posted by: ChrisBr

Hello Andy,

In case where itvAlt[p][l] would be absent or the last interval in the sequence, you are trying to get item(Setup_Product, <p.p, p.p>).t.

Are you sure that such item exists in the set? I mean: a tuple <a,b> where a==b.

Regards,

Chris.

Originally posted by: AndyHam

Thanks! That was the reason.
I wish the error message says something like this "missing tuple entry ..." ^^