A new update is available for SAS Cost and Profitability Management , version 8.1_M6 :
Driver rule formulas using the Match function or the equality (=) comparison operator do not behave as expected
Processing driver rules takes significantly longer in SAS® Cost and Profitability Management 8.1 than in SAS® Activity-Based Management 7.2
Note: A comprehensive list of all SAS hot fixes is available from support.sas.com. You can use the SAS Hot Fix Analysis, Download, and Deployment (SASHFADD) tool to manage your SAS hot fixes.