Message SAP WXP689 - User &4 has no authorization for displaying interface &3

Diagnosis
You want to display the definition for interface &V3&. You do not,however, have authorization to do so.

System Response
Processing was cancelled.

Procedure
Contact your system administrator for authorization to displayinterface &V3& for planning scenario/planning step &V1&/&V2&. Therelevant authorization object is W_WXP_INT.