SAP Message VAL802 - System error: Read impairment price for key date, parameter not filled

Diagnosis Not all the parameters necessary for reading the impairment rate werefound. The following parameters are required: Key date, company code,valuation area and valuation class. The following parameters were found: Key date &V1&, company code &V2&, valuation area &V3&, valuation classV4. System Response Processing is terminated. Procedure This is probably the result of a program error. Contact SAP.