In Windchill the "Add to Project" is not always available for an object. One administrator cannot see it, although all groups and profile settings are the same as two others and they get the action option. The option also disappears randomly for other users with the correct permissions to share objects from a library to the project.
A work around, Checkout the object and Undo Checkout seems to allow the Action item to reappear, but a refresh of the browser and the action is gone again.
