SAP Message UCF6808 - Book values entered in local and group currencies are incomplete

Diagnosis
Generally, no book value may be specified for the local currencyand / or group currency.
However, this does not apply to the combined entry of investmentand equity. In this case, book values have to be specified in local and/ or group currency for the investment as well as for equity.

Procedure
Specify the book values in local and group currency.