## UndefinedConstraintHandlingBehavior enumeration

Specifies the behavior used to handle tasks with undefined constraints.

## Members
| Member name | Description |
| :- | :- |
|NONE|The default behavior for loading from XER format.<br/>            No action is taken. A task constraint type is set to 'ConstraintType.Undefined'.|
|SUBSTITUTE_WITH_START_NO_EARLIER_THAN|Constraints with type 'ConstraintType.StartNoEarlierThan' and date = Start are added for tasks with 'Undefined' constraint.|

### See Also

* namespace [aspose.tasks](/tasks/python-net/aspose.tasks/)
* assembly [Aspose.Tasks](/tasks/python-net/)