MINLP-INFEASIBILITY

GAMS
1

I am actually trying to run a relatively large model for the first
time and I am still encountering difficulties. my result is giving
infeasible solution and a 0 objective function. Please does someone
has a solution to this? The model in below on the uploaded file.

regards, IBJ

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2

IBJ,

You might want to make an even smaller instance and produce a feasible
solution by hand. You can feed in the solution using the .l variable
suffix and let the solver confirm that all your constraints are doing
what they are supposed to do. This is part of the model development
process and sometimes not so easy, but only you as the model developer
can make this happen. BTW, the global optimization solver LindoGlobal
“proved” that your model is indeed infeasible.

Hope this helps,
Michael Bussieck - GAMSWorld Coordinator

On Jun 10, 8:01 pm, IBJ wrote:

I am actually trying to run a relatively large model for the first
time and I am still encountering difficulties. my result is giving
infeasible solution and a 0 objective function. Please does someone
has a solution to this? The model in below on the uploaded file.

regards, IBJ

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3

Thank you so much Michael, I really appreciate. Actually I have worked
on it again and has eliminated all the infeasibilities. but had now
zero, for my objective function.

On Jun 14, 10:49 am, Gamsworld Admin wrote:

IBJ,

You might want to make an even smaller instance and produce a feasible
solution by hand. You can feed in the solution using the .l variable
suffix and let the solver confirm that all your constraints are doing
what they are supposed to do. This is part of the model development
process and sometimes not so easy, but only you as the model developer
can make this happen. BTW, the global optimization solver LindoGlobal
“proved” that your model is indeed infeasible.

Hope this helps,
Michael Bussieck - GAMSWorld Coordinator

On Jun 10, 8:01 pm, IBJ wrote:

I am actually trying to run a relatively large model for the first
time and I am still encountering difficulties. my result is giving
infeasible solution and a 0 objective function. Please does someone
has a solution to this? The model in below on the uploaded file.

regards, IBJ- Hide quoted text -

  • Show quoted text -

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