Type: double
Modifiable: Yes

This attribute is used to set the allowable degradation for objective <span>$</span>n<span>$</span> when doing hierarchical multi-objective optimization. You set <span>$</span>n<span>$</span> using the ObjNumber parameter.

Hierarchical multi-objective optimization will optimize for the different objectives in the model one at a time, in priority order. If it achieves objective value <span>$</span>z<span>$</span> when it optimizes for this objective, then subsequent steps are allowed to degrade this value by at most ObjNAbsTol.

The number of objectives in the model can be queried (or modified) using the NumObj attribute.

For examples of how to query or modify attributes, refer to our Attribute Examples.