Credit Management Go-Live Update Activity

Hello Experts

Client has implemented SAP quite some time ago, but without credit management. Currently we have done the config for credit management. But I am stuck with upload of historical open document values (sales orders, deliveries, & invoices) and receivables. I have already executed RVKRED77, but it has failed to upload the historical open document values. However all open document values, post the config are getting updated correctly

Kindly suggest how to upload the historical open document values. Your correct assistance will help me to complete the task on time.

Looking forward to your replies

Regards

SF