When doing Mail Merge (Word and Excel), I received this error Error has occurred: "Sheet 1$" is not a valid name. Make sure that it does not include invalid characters or punctuation and that it is not too long.

This is the solution that worked for me: recreate the connection.

  • Click OK on "Sheet 1$" error box.
  • Click on Find Data Source... button.
  • Double-click on +Connect to New Data Source.odc
  • Select ODBC DSN
  • Select Excel Files
  • Browse for Excel file where your list of clients/data are entered. Then click OK.
  • Select the table/sheet name.
  • Click Finish to save data connection file.
  • Microsoft Word will open. Go to Mailings menu, then preview individual result by clicking the arrow.
  • Save the Word document.

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