As of December 5th, 2003, (build 10506), this message is a special case of the more general message that a token could not be found, and occurs if a character that was slated for special formatting, cannot be found at the end of the text part of token conversion of a textbox, and just before it starts to apply attributes.
This message is almost always due to the use of a holidays symbol filter (or of the no duplicates options) and informs you of the symbols that have been removed by filtering or the use of the no duplicates option.
You can usually ignore this message, after verifying that the textbox referred to in the message looks OK.
Topic 176240, last updated on 19-Apr-2020