It depends on your model and the solver. You can find it in GAMS Help, by the way, in the simplex method you need to define the Artificial variables in larger than and equality constraints and minimize them by penalizing Big-M in the original objective function.
On Mon, Jun 3, 2013 at 5:18 AM, Mohamad Dehghani wrote:
hello,
thank you for the response,
how can I make the model to look for other solutions when the current solution it found is not suitable??
thank you again
On Jun 3, 2013, at 5:55 PM, Masoud Barati wrote:
Hi,
You got the multiple solutions because of integer variables in your model.
Regards,
On Mon, Jun 3, 2013 at 4:44 AM, Mohamad Dehghani wrote:
Hello everyone,
I have a model in GAMS which include linear, non-linear equations and binary variables. So I used MINLP modeling with DICOPT solver.after solving the model, when i change the parameters values the response is not what expected.
for example, When i increase the payback period ( parameter) , the value for freshwater should decrease ( positive variable) but it increases slightly.
How can i stabilize the model?
I tried adding initial values but It didnt seem to work.
thank you very much
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.can u please give me a reference or a file to go through and understand how to fix the issue. I’m sorry but I’m a beginner in GAMS.