Chris,
It appears that Business_Days_Back function with > 1 day can only be used in BO rules & not in a Query or Process FIND action. When I tried to use BUSINESS_DAY_BACK(CURRENT_DATE,2) in a Query I got the error message:
"Internal error. Element BUSINESS_DAY_BACK in query condition Test.TestDate=BUSINESS_DAY_BACK(CURRENT_DATE,2) of query FIND Test WHERE Test.TestDate=BUSINESS_DAY_BACK(CURRENT_DATE,2) cannot be converted to the currently installed version of SQL "
BUSINESS_DAY_BACK with x business days CAN be successfully used in a RULE. For example, to flag instances of Payment BO with DueDate attribute 2 days back, use: Payment.DueDate=BUSINESS_DAY_BACK(CURRENT_DATE,2) Then Test.TwoDaysBack='Yes'
I think there is actually an easier way to achieve your result, though. See next post.
Tom