SAP Message WC133 - No EAN references maintained for material & in sales unit &

Diagnosis A regular change or a change with a future validity date has resultedin the EAN for the sales unit of this material being deleted. Eitherthat or the EAN was not maintained when the sales unit was maintained. System Response The record could not be prepared for POS outbound. Procedure Maintain the EAN for the material &V1& for the sales unitV2.