When using Network Analyst in a Python Environment you should use the GetNAClassNames utitlity function returning the language dependent Network Analysis class names as a dictionary. Using ArcGIS with the German Supplement you end up with "Einrichtungen" instead of "Facilities".
na_layer = arcpy.na.MakeClosestFacilityAnalysisLayer(...
na_classes = arcpy.na.GetNAClassNames(na_layer)
facility_class_name = na_classes["Facilities"]
arcpy.na.AddLocations(na_layer, facility_class_name, ...
GetNAClassNames Documentation
Product Manager
Developers and Location Services
Germany and Switzerland
%20Office%20skaliert.png "Jan-Tschada"){kind=avatar}
