The content of the pattern manifest (.rmd) files must remain in
sync with the pattern definition. If an error occurs, you can resynchronize
the manifest with the pattern definition by using the Regenerate
Definition Template menu item.
In the following screen capture, you can see the pattern definition
represented in the
Model Explorer view. Changes to the
pattern definition must be made by using the
Pattern Authoring view.

To regenerate the definition template, in the Pattern Authoring
view, right-click the pattern and click Regenerate Definition Template. The pattern definition model is regenerated and related errors
are removed.