directed graphs

[ogaida]

https://saveenr.gitbooks.io/visiopowershell_docs/content/automatic-diagrams/drawing-directed-graphs.html

I have a german Visio-Installation and i get this error on each directed graph:

Out-Visio :
Objektname nicht gefunden.     => objectname not found
In Zeile:1 Zeichen:7    => line: 1 character: 7
+ $dg | Out-Visio
+       ~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Out-Visio], COMException
    + FullyQualifiedErrorId : System.Runtime.InteropServices.COMException,VisioPowerShell.Commands.OutVisio

What can i do to solve the problem?