If the last paragraph in the document is a heading that is formatted to start on a new page (“References” for example) it may be that your references have usurped that paragraph information. I don’t think more recent versions of EndnoteX4 suffer from this, but EndnoteX did. Since it is hard to select all the bibliography since it is 200 pages long, I would unformat the whole document which may still need you to manually delete the residual bibliography. after that, make sure there is a paragraph after the references heading, and format that paragraph so there are no breaks (page break before) boxes selected. Now reformat the paper with your chosen style and turn the CWYW back on from the second tab, if you want it on. All fixed?