When trying to activate the Partial ledger settlement option, the following message appears:

You have cross-year ledger settlements. All cross-year ledger settlements must be reversed to enable partial settlements. Please use Review cross-year settlements in Ledger settlements to review and reverse them all. You can enable the partial ledger settlements when all cross-year ledger settlements are reversed.

Before enabling the Advanced awareness option, all cross-year settlements have been cleaned. According to documentation, ledger transactions that are settled across fiscal years could remain settled if they weren't settled against a transaction that was posted into year that's being closed.

As from the activation of the advanced awareness option, no cross-year settlement is possible. Therefore, there should be no problem with the year-end closing process in the current year, which was open with enabled "advanced awareness options" and without any cross-year settlements.

• The control when activating partial ledger settlements is too restrictive. It should be possible to enable Partial ledger settlements even if cross-year settlements exist in closed fiscal years.
• Users cannot reverse all cross year settlements in the closed fiscal years because in order to do this, they should reopen closed fiscal years that have already been financially audited and therefore can no longer be modified. 
• Also, if the fiscal years have been permanently closed, the Partial ledger settlement can never be enabled.