Double click the yellow triangle in the lower left corner of the window in the status bar. If you don't have the status bar showing, find the option and show it. Somewhere in there it gives you the line number of the problem. You can View Source and put it in MS Word or Dreamweaver or any application that will show you line numbers and find out which line the error is on. Don't know what it does it the error is in an included file instead of inline. In any case, zip it and sent all the details (IE version, oper system, Lectora version, to support@trivantis.com.