Interface errors - OKS

Hello Team,

I have couple of contracts which are in ACTIVE status and after successfully completion of the "Service Contracts Main Billing program" to send the billable lines to AR against those contracts I found the below 4 errors against both the contracts at the interface level.

Invalid bill to customer reference (ORIG_SYSTEM_BILL_CUSTOMER_REF) (NULL)

Invalid transaction type name (CUST_TRX_TYPE_NAME) (NULL)

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)

You must supply payment terms for your non-credit transaction. (NULL)