Word 2011 Mac: master document COM exception


I’m using the master documents function in word 2011 mac to create my dissertation. I have added all my chapters etc. with the unformatted citations. However, when I try to format the bibliography i receive this error:

A COM exception has occurred.

This method or property is not available because this part of the master document is locked for editing

I don’t see where in the master document anything would be locked, does anyone have any idea why this is happening?

Also this may help but I created the seperate chapters first then combined them in the master afterwards.



Oh I should note I’m using Endnote X4