In a task with assignments, it is not possible to adjust the task finish date to an earlier date when using Open Workbench (OWB).
Release : 16.0.0
Component : Clarity Open Workbench (OWB)
The task has assignments, each of them with an assignment finish date. It is not possible to have a task that finishes earlier than any of its assignments.
In Clarity, it is normally possible to make a task with assignments finish at an earlier date, even if it has assignments finishing later than that. However, when you shrink a task, it will automatically shrink the assignments as well so that the task finish date is not earlier than any of its assignments finish date.
However, in OWB, this is not possible - a task finish date still cannot be earlier than the latest assignment finish date, as in Clarity, but OWB will not automatically shrink them. OWB will not accept task finish dates that are earlier than any of its assignments finish date.
Adjust the assignments finish date before adjusting the task finish date to an earlier date if it is necessary.
Shifting Task Notes