@1
The selected position must be inside the current
graphic subrepresentation's frame.
Please try again to select a (new) position.
@2
A constraint should not restrict the outermost graphical frame.
@3
The two related objects should differ. 
Please select another object.
@4
A constrained object must belong to the graphical base class 'Node'.
Please select another object different from polylines, subrepresentations 
and text.
@5
Please select one of the menu items to determine the constraint
you want to operate on.
@10
@11
A constraint of the given sort already exists
between the two selected objects.
@12
A constraint of the given sort does not exist 
between the two selected objects.
Please try again.
