Diagnosis
The purchasing document type &V1& and the company code &V2& of thepurchase order entered have been assigned for integration of purchaseorder and credit-side down payment chain (in Customizing activityDefine Chain Types under Financial Accounting (New) ->Accounts Receivable and Accounts Payable -> Business Transactions ->Debit-Side and Credit-Side Down Payment Chains-> Enhance Debit-Side andCredit-Side Down Payment Chains-> Integration -> Assign Chain Type toPurchase Order Document Type).

System Response
The system does not allow you to create a contract with reference to apurchase order.

Procedure
Choose a different chain type if you want to refer to this purchaseorder.