Try each of the following steps in order until the error/issue is resolved:
  1. Export again to a local hard drive instead of a network drive
     
  2. Change export format from Excel to CSV (Comma-Separated Values) and export the file again
     
    1. Open the Export in the Raiser's Edge.
    2. Navigate to Tools, Select Export Options.
    3. Locate 'Export Format' and Select 'Comma-Separated Values' from the dropdown menu.
    4. Click 'OK'
    5. Export the file again.
       
  3. Recreate the query