Document splitting error when posting to fund

We are using ECC 6 including the new GL and have activated document splitting. In addition we are using Public Sector Funds Management.

Document splitting characteristics for general ledger of business area and fund are defined and mandatory.

Postings from Payroll to finance include business area and fund on all expenses accounts. Payroll postings to bank accounts and balance sheet liability accounts include a business area only and no fund. A constant for non assigned processes was defined and included default values for both business area and fund. During the posting process from payroll to finance these constants would be invoked based on the classification of document type and GL accounts for document splitting. The business area value provided by payroll would be overwritten by the business area default value from the constant and the fund would be populated by the fund default value from the constant.

We are in the process of applying year end support packs including SAPK – 60411INEAPS that included OSS note 1431816. This note corrects the “error” where GL view account assignments were overwritten. The application of this note prevents the payroll constant from overwriting the account assignment fields; business area and fund. As a result the posting from payroll to finance fails with the error message GLT2201 “Balancing field &1 in line item 001 not filled”

If we cannot use the functionality of the document splitting constant, how can we populate the mandatory fields; business area and fund?