The "vobulator" is the (licensed, not Adobe) Sonic program module inside Encore that works to convert MPEG video to the VOB format on a DVD... your message indicates a problem with a title
Of course, the interface between the Sonic modules and Encore's error reporting has been a LONG standing complaint, so there is no read indication of WHICH title (or font?) is causing the problem
Adobe/Jive have a BAD title for the SEARCH THIS FORUM function
Go back to http://forums.adobe.com/community/encore and, in the area just under Ask a Question, type in
You may now read previous discussions on this subject... be sure to click the See More Results at the bottom of the initial, short list if the initial list does not answer your question
Chapter markers on top of each other or too close to beginning or end?
Multiple videos on one timeline?
If not, are you using dynamic link?