Error while trying to generate TOC

Hi, While generating the TOC for a book, I encountered the following error: e:\docs\framemaker\WS\frontpage.fm Couldn't open frontpage.fm, because it was created with a previous version of FrameMaker. Can any of you advise me how to trouble shoot this error? Thanks, Deepsy.

Error while trying to generate TOC

Hi, While generating the TOC for a book, I encountered the following error: e:\docs\framemaker\WS\frontpage.fm Couldn't open frontpage.fm, because it was created with a previous version of FrameMaker. Can any of you advise me how to trouble shoot this error? Thanks, Deepsy.