YaST software update not working after update

Suddenly my YaST software is not working. When trying to activate YaST -> Software -> Online Update nothing happens. Right-clicking on SuSE Watcher in the panel result in an error message that "The command 'yast2' 'online_update' not found". What did I do? Nothing special, except from running software update around a week ago. As far as I remember that update included an upadte of some YaST components. Suggestion? Janus -- Roskilde University, Denmark. Department of Technology and Social Science. International Development Studies. ESST - Society, Science and Technology in Europe.