AutoInvoice master program error

hello Autoinvoice master program gives the following error Errors:  1) Invalid bill to customer reference (ORIG_SYSTEM_BILL_CUSTOMER_REF) ((Null))             2) The Bill To address reference must exist in Oracle Receivables, and it must be assigned to the Bill To customer               (ORIG_SYSTEM_BILL_ADDRESS_REF) ((Null))     Salesrep Number Salesrep Name              Sales Credit Type        Sales Group Name                  Amount        Percent     --------------- --------------------------- ------------------------ ------------------------ --------------- ---------------                                                                           Unassigned                    -852,390.          100.00         Errors:  1)Invalid salesrep number (SALESREP_NUMBER) ((Null))                   2)Invalid sales credit type name (SALES_CREDIT_TYPE_NAME) ((Null)) Pl advice. Thanks Gobind Ahuja