Originally posted by: TracyLLL

Hi There,

I was debugging my OPL program and kept getting this error msg:

Scripting parser error: missing ')' at the following line:

kband=sum(i in idtot)vol[i][2][2]/sum(i in idtot)vol[i][1][2];

Though I don't see a problem here, I tried adding parenthesis and revise it to the following (or similar) but still failed.

kband=(sum(i in idtot)vol[i][2][2])/(sum(i in idtot)vol[i][1][2]);

Can anyone tell what the problem was? Thanks a lot!

The related code block and the whole structure are as follows:

 

int vol[idtot][apid][LTRid]=...;

dvar...

#DecisionOptimization
#MathematicalProgramming-General

OPL questions like this should go to the OPL Forum here.

I am not an OPL expert. Could it be that you cannot use 'sum'  in a scripting block? One thing that works without problem for me is

execute {
   var numerator = 0;
   var denominator = 0;
   for (var i in idtot) { numerator += vol[i][2][2]; denominator += vol[i][1][2]; }
   kband = numerator / denominator;
}

#DecisionOptimization
#MathematicalProgramming-General

Originally posted by: TracyLLL

 

 Daniel,

Thank you for your answer. Your suggestion works well.

I would like to figure out if 'sum' cannot be used in scripting block. I will move this post to the OPL forum.

Thanks!

 

 

#DecisionOptimization
#MathematicalProgramming-General