I can not generate this error, even if I place a few components outside if the marked area.
Only thing that happens is that I get a popup, saying that there is a graphical error, and then it completes the compile.
What Guide version are you using?
I would first look very closely at the error report, for any hint of where the component is.
Then I would look though the pages changed since the last succesful compile.
If that does not work, then I would cut out pages that seems likely to contain the component.
I hope this helps you.