SAP Message WXP710 - Error occurred when activating hierarchy table &1

Diagnosis
An error occurred when activating hierarchy table &V1&. The table couldnot be generated in the dictionary.

System Response
The planning scenario cannot be activated.

Procedure
Contact your system administrator. You may not have the authorizationto activate tables.

Procedure for System Administration
Function module 'DDIF_TABLE_ACTIVATE' returned error code '&V2&'. It ispossible that you do not have authorization to activate hierarchy tablein the database for name range '/1ISRWP/'.