My original config, which works without issue, simply points to the ZSTATFCSTBF KF for proportionality.
I am trying to set a disaggregation expression in my SFBF override to check the SFBF first then default to the Proportional Factors, so that I have a backup if there is no stat existing for a combination. All KF's are stored and exist at the same base planning level.
Within my disaggregation expression my calculation is
IF ( ISNULL ( "ZSTATFCSTBF" , "ZPROPFACTORS" , "ZSTATFCSTBF" )
but when I attempt to save the config - the error message statesThere is an error in the disaggregation expression.
ZFCSTDMDOVERRIDE: Please check the validity of the disaggregation expression.
What am I missing in my syntax? I followed the configuration example in https://launchpad.support.sap.com/#/notes/2365315