GAMS World Forum

Hi
GDXXRW has the option "CheckDate": it checks before importing the data from an excel sheet if the sheet has been changed in the meantime. If not, it will skip the import and use the already available gdx file from the most recent import.
Cheers
Renger

Hi Luca If you are sure that the equations are the same, make a check by writing a report parameter that looks at the differences between solutions (just write out the matrix fssol for every solve and compare them. Thy dynamic set works fine (one element of the set is added in every run). Cheers Ren...

Hi
Could you please post a running example of the matlab code, i.e. how you generate the variable n? Don't expect people to infer parts of your code .
CHeers
Renger

Hi Luca
It looks obvious that you have different solutions as you choose different values for the parameters.
The question on the dynamic set is hard to answer without the code to run the model and the exact error.
Cheers
Renger

Hi Take a good look at the error messages. They appear right where you made an error. 163 eq1.. Z =e=(1)*sum((d,dl),pdemand(d,dl)*Charge_DSO(d,dl)) 164 + sum (GSP,Pgrid(GSP,d,dl)*LMP(GSP,d,dl)) **** $149,149 $149,149 **** 149 Uncontrolled set entered as constant Gams tells you what went wrong: You u...

Hi

Michael was faster with replying.
Another hint:
Have a look at https://www.gams.com/latest/docs/UG_FixingErrors.html and search for "errmsg". If you use the trick described there, the error messages will appear in your listing file directly below the error itself.

Cheers
Renger

Hi

Just enter "matrix" in the search field on the Gams homepage and you will find lots of information (and read the "rules" for this forum ).

Cheers

Renger

Sorry Ike, no idea to rewrite the equation.
Renger

Hi

You could make it a MINLP instead of a MIP. This solves fine using DICOPT.

Cheers
Renger

Hi Ike
It is hard to say what the problem is as the syntax of this specific constraint looks fine.
Could you attach the model?
Cheers
Renger