How can I export journal entry data incl. user information for auditor (JET analysis)?

Hi,
we need to extract a full journal entry list including subledger data and information about the user who performed the transaction.
The external auditor wants to use the data to run a journal entry testing (JET analysis).

The default Account Analysis is missing user data, so we tried building a report in OTBI instead.
We managed to add the user information, but we haven’t been able to add the subledger document or voucher number in a separate column.
As soon as we try combining columns from subject area "General Ledger – Journals Real Time” with subject area “Subledger Accounting – Journals Real Time”, we get an error.