The validity error is telling you that if the metropolitan area (MA) number does not equal NA then the MA, state and county codes must equal a valid combination outside a MA, i.e., your MA, county and census tract don't go together and you need to figure out why. Run a error report to find out how many bad combinations you have out there and scrub the data again. Also make sure that you have set up your Assessment Areas correctly. If you need help with setting up Assessment Areas, go out to the FFIEC CRA site and click on "how to file." If all else fails, contact the CRA Assistance Line at 202-872-7584.