Indicates whether the model has multiple objectives.
Note that the case where the model has a single objective
(NumObj = 1) is slightly ambiguous. If
setObjectiveN to set your objective, or if you set any
of the multi-objective attributes
(e.g., ObjNPriority), then the model
is considered to be a multi-objective model. Otherwise, it is not.
To reset a multi-objective model back to a single objective model, you
should set the
NumObj attribute to 0, call model update, and then set a
new single objective.
For examples of how to query or modify attributes, refer to our Attribute Examples.