I have created a custom property but when I use it in a page type the following error appears in the tree view in edit mode:
[NullReferenceException: Object reference not set to an instance of an object.]
EPiServer.Core.PropertyDataCollectionFacade.EnsureAllPageTypeProperties(String languageBranch, PropertyDataCollection props) +484
EPiServer.Core.PropertyDataCollectionFacade.InitializeData(Boolean clearCommonProperties) +191
/René
Do you get the same problem if you add built-in properties to a page type?
Can you provide some more information? Preferably a short code sample of a custom property causing this error.
/Stefan