GAMS World Forum

Hi
It is hard to see where the problem is, as you either supplied the code you used nor the include file.
Please read the guidelines before posting.
CHeers
Renger

Hi Anna

You are on the right track: Cheers
Renger

GAMS tells you that the dimension 115 costfinal(t) .. zf(t) =e= z/(AED(t)*10*4380); **** $148 148 Dimension different - The symbol is referenced with more/less indices as declared You defined z over t (i.e. z(t)). For optimization you can't have multiple functions to optimize. If you want to solve t...

Hi The only thing I can think of (but this is not my field of expertise) that somewhere in your model you also relate CU and CA (something like CU = q*CA and this conflicts with the two equations defining CU and CA (one being d times and the other 1-d times CR). Or you relate X(t) with those variabl...

Hi Nikou

Sorry, my misunderstanding. No, using display this is not possible.
Cheers
Renger

Hi
It is hard to say what is wrong with your data without the model and data file itself. But perhaps you can take a look at this page where the error is explained.
Cheers
Renger

Hi
I think that when you study the documentation on the PUT command, you will be able to do that yourself.
Cheers
Renger

Hi If you set a lower bound of 1, the variable is not allowed to be below 1. It is a constraint. To avoid division by zero, you have to set the starting value (e.g. X.L and not X.LO). GAMS uses the level for a variable as a starting point, the final value can be different. If you set X.LO = 1, it ta...

Hi

Sorry, I can't be of any help here. Perhaps you could search for ideas in this forum.

Renger

PS. If you add the option CheckDate at the end of your gdxxrw command, it checks if the excel file changed, if not, it doesn't read the data and saves you time.

Hi
You can set any level you want for this variable, as long as it solves.
Your second problem formulation doesn't solve (it is infeasible). Perhaps some of your constraints do now allow for an optimal solution.
Cheers
Renger