Error with my map...(Solved)

[Superusuario]

I'm entering a map for the Official Level Design Contest and since i went to finish the last theme and i go to test my map this error appears:

Error 6  in StoreMapLumps(): Overflow

I can't save my map or nothing with this error...
And ater 2 more errors that say the same appear and after appears:

The nodebuilder did not build the requiered structures.
Please check your map for errors or select a different nodebuilder.

Your map will be saved without the nodes.

How can i fix this?
EDIT:This problem has been fixed...

 

[RoyKirbs]

This problem is frequent, this error is because the "Whatever it was called" (It has something to do with Floor over Floors) is now beyond the map barriers. To fix this just click center view and drag the things outside the barrier (The red square) back inside the barrier.

Someone else may have a better explanation, I just hope it helps.

 

[Superusuario]

Thanks!I just got the error by using the FOF Wizard...It made the sector that contains the FOF linedef far away from the map...