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Argument Error: Invalid Characters Found in the File. Please Ensure the File has Valid UTF-8 Encoding


  • Error appears when attempting to import a CSV file into Clio


  • Clio Web App
  • Microsoft Excel

Additional Information:



Clio uses CSV UTF-8 format for its Imports. If an Excel file is set up using a different format, Clio may be unable to read it. 


  1. Open the file in Microsoft Excel
  2. Click Save As
  3. Open the File Format drop-down menu
  4. Select CSV UTF-8 (Comma Delimited) (.csv)
  5. Click Save


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