Problem with Access export

I am trying to create an export file in .CSV format via a query. After I’ve named the file and clicked the “Finish” button, I get this message from the Export Text Wizard: “Invalid argument”. When I click “OK” I get this unhelpful explana- tion: “Anerror occurred trying to export data from table ‘Customer_Query’. The data was not exported.” The export file, of course, is not created.
Can anyone provide information on what is going on here?