R12 Muitiple in a Journal Batch that belongs to diffirent ledger

It say's that a batch can contain multiple journals, each of which can belong to a different ledger and all of the ledgers within a batch have the same calendar, period type, and chart of accounts. When I hit Journals,  it's required field that I  select a particular ledger from the header level. It the system is forcing me to select a ledger , how can I enter a multiple journal in one batch that belongs to multiple ledgers?