GAMS World Forum

Hi,

By default, the solution listing contains what you are asking for: https://www.gams.com/latest/docs/UG_GAM ... ionListing
You might also be interested in the display statement: https://www.gams.com/latest/docs/UG_Dis ... ement.html

I hope this helps!

Fred

Hi, First of all, the beauty of modeling languages like GAMS lies in its concise syntax which allows you to write compact indexed optimization models instead of huge incomprehensible scalar models. I assume your variables xij should be interpreted as "how often does the arc between nodes i and j nee...

Hi, Not sure if I fully understand what you are asking for. Sounds as if you want to compute a Hamiltonian path ( https://en.wikipedia.org/wiki/Hamiltonian_path ) and/or a Eulerian Path ( https://en.wikipedia.org/wiki/Eulerian_path )? It will increase your chances to get help if you elaborate your p...

Hi, Your last post might be confusing to readers because point 2. obviously does not apply to the example from this forum post where the readycollect function has a wait time (in contrast to the actual code you sent to support@gams.com). However, the absence of a wait time is not part of the problem...

Hi, A variable has several attributes: https://www.gams.com/latest/docs/UG_Variables.html#UG_Variables_VariableAttributes You need to specify which one you would like to use, e.g. x.l('1','3','2')=1; to set the variable's level to 1 or x.fx('1','3','2')=1; to fix the variable at 1 (upper and lower b...

Hi, As indicated in my previous post and by the first error message *** Error 145 in ...\new1.gms Set identifier or quoted element expected set elements must be quoted. After changing equation d to d(i,s).. 2*x(i,s,'2')+x(i,s+1,'1')+ x(i,s+1,'2') =l= 2; the model solves. I hope this helps! Fred

Lucas,

It would be much easier to help, if you would make sure that your posts are properly formatted, for example by using the "Preview" button.

Fred

Hi, Looks as if you want to refer to a particular set element explicitly in the third index position of x. In that case, set elements (aka labels) must be quoted. Helping you would become a lot easier if you share your code such that users can reproduce the exact issue. Just saying GAMS doesn't allo...

Hi, Not sure if I understand what you are asking for. Of course, sum(i, p(i,t)) can be greater than dataLP(t,'load')-pv, even for all realizations of random variable pv for example because you link subsequent time steps via Ramp1 and Ramp2 equations. Also not sure what is meant with after adding the...

Hi, you cannot go directly to the branch and bound method without solving the root node LP. If you would like to providea starting point, which is basically a (partial) integer feasible solution, you can do that by setting the level attribute .l of the variables before the solve statemment and instr...