I guess some mix with TAB and spaces to get the table aligned. I would remove TABs whereever possible and go with spaces only. If that's not the case you should upload (not copy paste because too much can change) the model file so one can reproduce.
-Michael
Search found 1033 matches
- 8 months ago
- Forum: Syntax
- Topic: Table Error 225
- Replies: 1
- Views: 4814
- 9 months ago
- Forum: Syntax
- Topic: dimension error
- Replies: 5
- Views: 5717
Re: dimension error
GAMS has domain checking for a good reason. If you circumvent this by declaring your equations without a domain, then the system can't help you with your own mistakes. Your equation res_dem is defined over (s,t) but you access this (to assign to price) as res_dem.M(t,s). If you would have declared w...
- 9 months ago
- Forum: Solvers
- Topic: Saving Time of when best solution was found & log and lst files with unique names
- Replies: 3
- Views: 5257
Re: Saving Time of when best solution was found & log and lst files with unique names
I don't think there is a general "time saving" option in BARON. Even though your best incumbent is found quickly BARON still needs to move the dual bound to reach the optimality tolerance. That can sometimes take a long time, even if you already know and hold the optimal solution. If you c...
- 9 months ago
- Forum: Solvers
- Topic: BARON numLoc & local search preprocessing
- Replies: 2
- Views: 4862
Re: BARON numLoc & local search preprocessing
In GAMS, solver option are passed via a solver option file. You can create this inside a GAMS model via $on/offEcho > baron.opt (at compile time) or via put files at execution time. The use of solver option files is explained here: https://www.gams.com/latest/docs/UG_SolverUsage.html#BASIC_USAGE_SOL...
- 9 months ago
- Forum: Solvers
- Topic: BARON: terminates solver when solution does not improve after x amount of time
- Replies: 1
- Views: 4645
Re: BARON: terminates solver when solution does not improve after x amount of time
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
-Michael
- 9 months ago
- Forum: Modeling
- Topic: Problem infeasible or unbounded
- Replies: 1
- Views: 2630
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. -...
- 9 months ago
- Forum: Syntax
- Topic: dimension error
- Replies: 5
- Views: 5717
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 ...
- 9 months ago
- Forum: Syntax
- Topic: dimension error
- Replies: 5
- Views: 5717
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
- 9 months ago
- Forum: API
- Topic: Trouble installing Python GAMS API on Mac OS
- Replies: 5
- Views: 4519
Re: Trouble installing Python GAMS API on Mac OS
Yes. -Michael
- 9 months ago
- Forum: Modeling
- Topic: How do I formulate logical expressions in equations with variables??
- Replies: 4
- Views: 2506
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