Users have the option to enter an Event Registration in an Enhanced Revenue Batch, using Apply to Commitments. However, they are finding that intermittently the link to the Event Registration is removed from the Application field while Validating the Batch. The causes the exception 'Required Field Missing; Designation'.
Download and install the latest patch which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.