Have an Access db that we are exporting data to a CSV formatted file. Have some fields in tables defined as Double data type (General Number, auto decimal). When exporting the data, getting strange rounding of the numbers, some up and some down. If I change the defined data type to Single (General Number, auto decimal) the exported data appears to be correct and correctly formatted. We are manipulating the data before export by queries and code. The only mathematical operations are addition and subtraction. Any Ideas?