GAMS World Forum

I am trying to run a model using NEOS from Python For modelling I am using: def get_model_text(): For the data , I am importing it from excel. Then, I want to combine it and send it to NEOS to solve. The example in GAMS implementing NEOS uses a .gms file which contains the data and model both, as im...

Can we add data from excel file, model from texts and then use python to send it to NEOS ? model = 'trnsport' # str | Name of the main .gms file ws.gamslib(model) The example in GAMS uses a .gms file which contains the data and model both. I am trying to build my model from the text and get data fro...

I am solving a nlp using barons, I tried restricting the number of iterations to a fixed value like 100. I am sending my problem to neos and it always solves problem to optimality. I am adding the following code to restrict iterations $onecho > baron.opt MaxIter 100 $offecho How can I restrict the n...

I am using Barons to solve a nlp.
I want to add constraints after every iteration and check for some conditions.
I also want to interact with the solutions obtained at each iteration.
Is there any example or guide implemented already.

Thanks.

The alias part is working fine.

But I want to run the constraint for i!=ii.
The code you provided gives the following error.

constraint(k, i, ii) (ord(i) <> ord(ii))..

Error:

'=' or '..' or ':=' or '$=' operator expected
rest of statement ignored

Thank You for your reply.

I am new to GAMS, previously I was using CPLEX, In CPLEX we had iterative variables and sets as separate. But in GAMS there doesn't seems to be an iterative variable. Here is my problem. Sets i products / Product1, Product2, Product3, Product4,Product5 / k customers / Customer1, Customer2,Customer3,...