In general, specific requirements must be met for versioning to be performed.
If one of the requirements is not met, versioning cannot be performed. For example, if a user does not have the privilege required to version the selected items, a corresponding message is displayed. The log file informs users of the items for which they do not have the required privileges.
However, versioning cannot be performed if access to the items is being prevented by other users. This is the case if certain items are locked by other users, for example, because they have opened a model.