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

\

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

\

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 -