package gurobi does not exist

[Saeed Poormoaied]

Dear all,

I am using Guribi with Netbeans interface. I do not know how to add the Gurobi package to NetBeans. I looked over the FAQs provided in gurobi optimizer web. But, it does not work. 

Thanks in advance.

The best,

Saeed

[Robert Luce]

Hi Saeed,

could you please post an exact error message, or a screen shot?

The first step is to add the file gurobi.jar to your project's libraries in Netbeans.  You can find this jar file in the Gurobi installation directory, in the folder 'lib'.

Robert

[Saeed Poormoaied]

 Dear Robert Luce,

Thank you very much for the reply. It is the error. I added the gurobi.jar, but I still have this error. Could you please tell me where I should paste gurobi.jar in the Netbeans files?

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[Robert Luce]

Hello Saeed,

Please put the gurobi.jar file per drag-and-drop to project tree at

<your application>

  + Libraries 

Please find attached a screenshot of the sample project tree I created on my machine.

Robert

[Saeed Poormoaied]

Dear Robert,

Thank you very much for the reply. I fixed it and it is now working. But I encountered another problem which I attached it. I did copy and paste the Gurobi Code provided on the website. For example, I used  Mip2.java. But it gives an error "Error code: 20001. Variable not in model". I used all sample examples on the web. In all cases, it gives the same error as above. Could you please tell me how I can fix this error? Thanks in advance for your help.

The best,

Saeed

[Robert Luce]

Hello Saeed,

I cannot reproduce the error you are reporting.  Could you maybe debug this on your side a little bit further and find out at which line the error is thrown?

Robert

[Saeed Poormoaied]

Hello Robert,

I solved my problem. I sent an email to you. I think you didn't receive it. The error was exactly in the lines at which I add constraints. Whenever, you write a constraint you need to write "model.update(); " in order to the model is updated. Now, the model is along with constraint and it is working.

Thank you very much for your consideration.

Saeed Poormoaied

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