Changing citation methods

Please help with a Word plug-in problem I'm experiences. I've written my document, using the Chicago Footnote method for citations. I want to now change all the references to either Chicago or Harvard (Author-date), but when I try I receive an errors message that begins with:

Exception..."the operation couldn't be completed.
OSStatuserror -1728.)@convert:document.m:723]'

{etc.}

What does this mean and can I do anything about it?

This is an old discussion that has not been active in a long time. Instead of commenting here, you should start a new discussion. If you think the content of this discussion is still relevant, you can link to it from your new discussion.