There is no tip 24. By this point in the session, either...

a - The recording has been successfully completed and is "in the can," or b - The recording session has been suspended due to "ill health" or a previous commitment, or c - The band has broken up, or d - The engineer has quit, or e - The producer has quit, or f - The producer has fired the engineer, or g - The band has fired the producer h - All of the above and the record will never see the light of day.