In Task managertool that enables the linking of temporal data to a model

The task manager can be used to create, save, and manage tasks that are used to create a schedule.

Model objects can be added to the tasks. Organizer categories can be used to select the model objects that will be added to the tasks.

, creating a dependency in the Gantt chartdiagram that displays the schedule related to a scenario in a graphic form

could cause all the tasks to disappear and Task manager to stop working. This has now been fixed.