GL Finance datasource 20

Hello, i have a question regarding this comment on help.sap.com "http://help.sap.com/saphelp_em70/helpdata/en/74/c047de8e5a49808f28295942dc3297/content.htm"

"It is only possible for totals records to be read from the archive once you have implemented SAP Enhancement Package 5 for SAP ERP 6.0 and have activated the business function New General Ledger Accounting 3 (FIN_GL_CI_3)."

What does this mean?