The Error: Unable to run DU because of an error related to the 1003, borrower data, interview date, or data entry field is not submitted correctly in the loan. The issue only seems to effect UCS users since the credentials are managed by the user.
Example of Error:
According to Ellie Mae's Resource Center, the error provided has to deal with the credentials being incorrect for DU.
If changes have been made to the credentials, re-entering the credentials into DU should resolve the error. If after re-typing the credentials the error still persists, email firstname.lastname@example.org for further assistance.