AP_INVOICE_LINES_INTERFACE.DIST_CODE_CONCATENATED

We are having an issue with integration between Oracle Utilities CC&B and EBS, in particular the refund process feeding into Oracle Payables. When we run the delivered process, the GL_ACCT is being populated from CC&B through the Dist_Code_Concatenated field. When the field is being populated, dashes are being inserted between the segments. When we run the Payables Open Interface, we get the error "Invalid Distribution Acct". If we go into the interface table and update the dashes to periods, they load fine. In reviewing the Oracle documentation, this functionality seems to be operating according to the documentation. Am I missing