Booklet and comment

[lupus_3]

I have set up MinimServer according to the sections "Information files" and "Format properties" in the user guide. This involved using the following format setting:
Comment.displayFormat={$*infoFileURI^<a href="^">Digital booklet</a>$comment}.
Now I got an error message "item tag name 'comment' is listed in indexTags". When I delete 'comment' from the indexTags the booklet is shown coreectly. But I need the tag 'comment' for other purposes as well. Is there a solution for this?