Not with BARON. Some solvers allow you "user defined" termination via callbacks and this is made available to GAMS users, see e.g. https://www.gams.com/latest/docs/S_CPLE ... ipstopexpr.
-Michael
Search found 1049 matches
- 11 months ago
- Forum: Solvers
- Topic: BARON: terminates solver when solution does not improve after x amount of time
- Replies: 1
- Views: 7647
- 11 months ago
- Forum: Modeling
- Topic: Problem infeasible or unbounded
- Replies: 1
- Views: 3375
Re: Problem infeasible or unbounded
Nothing. You should use code boxes for your model and output though. You model in unbounded. Just limit the objective variable (e.g. z.lo = -1e6;) and see what "run away" variables you get. Check your application why this should not happen, turn your insight into constraints/model logic. -...
- 11 months ago
- Forum: Syntax
- Topic: dimension error
- Replies: 5
- Views: 9465
Re: dimension error
The attached program succeeds without a problem. If I remove the $stop and let GAMS continue, I get compilation errors when compiling "startup(s*,i,t)", you probably means "startup(s,t,*,i)" at least that makes sense from the code you have later. Now after fixing all this, I get ...
- 11 months ago
- Forum: Syntax
- Topic: dimension error
- Replies: 5
- Views: 9465
Re: dimension error
Don't just paste your GAMS source as normal text. There are fine code boxes in the forum editor. Also this issue is related to data so upload your Excel and GDX file as well so one can reproduce the error.
-Michael
-Michael
- 11 months ago
- Forum: API
- Topic: Trouble installing Python GAMS API on Mac OS
- Replies: 5
- Views: 8749
Re: Trouble installing Python GAMS API on Mac OS
Yes. -Michael
- 11 months ago
- Forum: Modeling
- Topic: How do I formulate logical expressions in equations with variables??
- Replies: 4
- Views: 5008
Re: How do I formulate logical expressions in equations with variables??
Look for logic equations in the forum. It is a frequently asked questions.
-Michael
-Michael
- 1 year ago
- Forum: Syntax
- Topic: Loading data from Excel Sheet into GAMS
- Replies: 4
- Views: 8340
Re: Loading data from Excel Sheet into GAMS
Please read the documentation of gdxxrw at https://www.gams.com/latest/docs/T_GDXXRW.html. All parameters are read with the index k and the value of the parameter in the neighboring cell. Your sheets don't mention the index (k) at all. You did not provide the elements of set k, but here I am assumin...
- 1 year ago
- Forum: Modeling
- Topic: Assistance with conditional non-equals
- Replies: 4
- Views: 3134
Re: Assistance with conditional non-equals
I see. Debugging models is hard. What you need to do is to take be "better" solution you get by just providing the .l (or leave this out because it has no effect) and look at this solution. Explain the solution to yourself and detect the flaws in this solution. Next look at the equation th...
- 1 year ago
- Forum: Syntax
- Topic: Dimension Different Error (electricity pricing model)
- Replies: 2
- Views: 6482
Re: Dimension Different Error (electricity pricing model)
I think you need to upload something that lets us reproduce the error. I can't do this from the code snippets you have pasted.
-Michael
-Michael
- 1 year ago
- Forum: Syntax
- Topic: Loading data from Excel Sheet into GAMS
- Replies: 4
- Views: 8340
Re: Loading data from Excel Sheet into GAMS
Sure, if you provide the Excel files to see what's going on.
-Michael
-Michael