SAP Message /POSDW/UI_CHECK007 - System variant &1 does not exist

Diagnosis
Standard variant &V1& that belongs to the POS Workbench does not exist(any more).

System Response
The POS Workbench will be executed via the selection screen.

Procedure
Make sure that at least the system variants exist in the system orassign each user their own variant using the button 'Assign Variant' intransaction /POSDW/MON0.