When you have segments in your source general ledger, such as Program, that cannot be mapped to Hyperion Financial Management, data is summarized across those segments. For example, if you have a Program segment with values A, B, and C in your source general ledger, but no corresponding segment in Hyperion Financial Management, the data for those values will be aggregated and mapped to a default member in Hyperion Financial Management. The unmapped segments do not default to future use segments in Hyperion Financial Management, as these segments are reserved for future expansion. No data is transferred is not a correct statement, as data is transferred but summarized across unmapped segments. Errors do not occur for unmapped segments, as data is transferred but summarized across unmapped segments. You cannot map multiple segments from source general ledgers to the target segment in Hyperion Financial Management, as this is not a supported option. Reference: Oracle Financials Cloud: General Ledger 2022 Implementation Professional Objectives - Consolidate Balances 12