Can you post your Storyboard? It sounds like you have some kind of Binding in the Storyboard definition.
Ok so, as I suspected, it’s because you’re using a Binding
in your Storyboard
. You can’t do this because WPF attempts to freeze all the resources leveraged by a template for efficiency and when you use a Binding on a Freezable
, in this case the Storyboard
, it prevents it from being able to be frozen.