This error can be caused by a number of issues, but most frequently is related to an unknown character in your report. The most common source is an extra space at the end of one of the contact names or addresses of one of your contributors. If you have used the “copy & paste” method for any of your entries, those entries would be the most likely cause. You can view and edit your list of contacts by going back to ACCOUNTS>CONTACTS. You may be able to see the extra spaces in order to delete them. Even if you cannot see them, you can still use the delete or back space to remove them.