Need Help With Tytool 9R13, Error message:

[TomP]

When I try to make my IFO files I keep getting the following error:
"There Is Currently An Unused VOB" and it won't allow me to make my IFO files. Any Ideas? Thanks:
TomP

[malfunct]

You haven't assigned all the VOB's you have added to process to a menu item. It means exactly what it says. So click on each menu item, give it a title and choose a VOB file for it in the drop down and click "set item". The message should go away.