Unable to AddObjective after Clear due to name collision

[Jessica Wong]

If I build a model, then call the Clear() function, that is supposed to clear any existing Objectives. However when I try to AddObjective again it fails with:

 System.InvalidOperationException : The Model already contains an Objective with the name <objective name>. Please choose a different name.

I can confirm that Clear removes the objective since I can see ObjectiveCount = 0 before the AddObjective. If I change the objective name (by adding a timestamp), then AddObjective works.

Is this a bug?

[OPTANO Team]

Hi,

Indeed. Sounds broken.

I'll run a few tests on that and will get back to you asap.

Best,

jp

[OPTANO Team]

Hi!

We have reproduced the issue and created a fix.

It will be reviewed shortly and then published to nuget.

As of now, you might use a workaround. just add some unique element to the objectives name, such as

 model.AddObjective(new Objective(x), string.Format( "Test {0}", DateTime.Now.GetHashCode().ToString()));

or replace the model with

model = new Model();

 Thanks for sending in this issue!

Best,

jp

[OPTANO Team]

Please find the fixed version online on nuget.org

Best,

jp

[Jessica Wong]

What is the version number that includes this fix?