If a driver selection is deleted, and no new driver is selected, an error is reported during validation to indicate that an assignment does not have a driver selection.
To delete driver selections:
In an open model, from
Task Areas, select
Manage Allocations, then
Driver Selections.
Select a POV, and then click
Go
.
Select a Layer.
On
Driver Rule, under
Stage, select the model stage.
Select the row containing the driver selection to be deleted.