You are not authorized to access table ‘Agreement’ (AgreementHeader). Contact your system administrator.

Hi,
I am trying to create a credit note for a PO which has status as "received/open order" and approval status as "approved" from Procurement and sourcing > Common > Purchase orders > All purchase orders by clicking on "Create  credit Note" icon in purchase tab after selecting a purchase order line. Getting message that "You are not authorized to access table ‘Agreement’ (AgreementHeader). Contact your system administrator."
Can any one help me.