GAMS World Forum

Hi

Are you using Gams 22.2 or a newer version? This might be causing the problem. Download a newer version and try if it works.
Cheers
Renger

Hi
You are assigning the value to a vector (P_1(ii)) and not to a scalar P_1=P_rec(ii). So,just replace P_1(ii) in your loop by P_1.
Cheers
Renger

Hi You define the equation over bi , but the equation itself is over bi and bj on the left hand side: conic(bi).. V(bi)+V(bj) =C= sum(bj, (2*P(bi,bj) + 2*Q(bi,bj))) In this equation, Gams has to use one V(bj) but is not clear which bj to choose. Then on the RHS you use at the same time the sum over ...

Hi Stef As I wrote before,f you sum over two indices, they should be surrounded by parentheses (e.g. sum(i,t....), b(i,t)*x(i,t));). Furthermore, your summing of the objective misses a closing matrix. As GAMS collects all the set elements used in a model from begin to start in a unified element list...

Hi

Exporting your listing directly to pdf or excel is not possible in GAMS. You can of course print your listing as a pdf-file. If you want your results to be exported to Excel, you might want to look at the gdxxrw utility (see the GAMS documentation).

Hope this helps,

Renger

Hi Rodrigue I have a "3am-question" when teaching CGE. This is question that every student should be able to answer immediately and without hesitation when I would wake them at that time. The question is "What is the most important point when debugging your benchmark?" The answer...

Hi Tonanto
The last reply was 2 years ago, so it would be better to post your problem instead of relying on a continuation of this post.
Cheers
Renger

Hi Stef It would be better to attach the code..., but here some hints. Look always at the first error that appears. Following errors can be caused by the first error. In your case error 148 148 Dimension different - The symbol is referenced with more/less 148 indices as declared It looks like you de...

Hi Zack I don't know if this helps: set i /first, second, third, fourth/; parameter TT(i); TT('first')=0; TT('second')=0; TT('third')=1; TT('fourth')=0; parameter k(i); alias(i,j); K(i) = 1-sum(j$(ord(j) < ord(i)+1), TT(j));; display k; This gives: ---- 15 PARAMETER k first 1.000, second 1.000 Cheer...

Hi

It is not clear what you want to do with this equation. My advice: write it down as a proper mathematical expression, read how to use the sum in GAMS as well as the $-sign, and proceed from there.

Cheers

Renger