SAP Message AJ070 - No price key was found for price operand &1

Diagnosis Operand &v1& is used as output operand in rate &v2& (program &v3&).This is a price operand (operand category: QPRICE or TPRICE). No pricekey has been defined in the installation facts for this operand. Procedure Specify a price key in the installation facts for operand &v1&, wherebythe corresponding price must be an average price.