I suspect the formatter is expecting a string, whereas getItemValue doesn't necessarily return a string.

One option I've used is @Text(myDoc.getItemValue("Date"),"D0S0");

Using a date converter on @Text(myDoc.getItemValue("Date")) doesn't seem to work though.

I share your frustration, I have wasted hours and hours on this. A java.util.Vector is returned and as you say the Convertor won't work on it.

 

There must be 100's of samples out there on how to create basic XPages and the like far more than what is needed, but so little info when you get bogged down with trying to do simple things that you can do in Notes without thinking about it. All the learning resources seem to jump from the basics to the advanced with massive holes in the middle. Sorry, not helpful I know, guess I am just venting some frustration.

 

Mark.