From Windchill 12.0.1.0 release, the training tasks are controlled only through groups and group membership. The ability to create training records for users and organizations is disabled but the Training Records table displays the training documents for both, users and organization.

The training records can be created for group members and nested groups (groups within groups) of the top-level group for which the training record was created. When creating new training records for expired and revised documents, the users must have membership in a group that has a training record for the target document.

If you are upgrading to 12.0.1.0, add users who have existing training records to a group that has a Required training record for the document referenced on the existing training record.