SAP Message USMD1157 - Data model &1: No authorization for entity type &2 - activity &3

Diagnosis
The authorization check for authorization objectUSMD_MDAT shows that you do not haveauthorization for this activity with regard to data model &V1& and atleast one entity of entity type &V2&.

System Response
You cannot execute activity &V3&.

Procedure for System Administration
Before you can perform the activity, your system administrator needs toextend your authorization profile.