If you have unintentionally destroyed the ECB-layout, you can always
restore the layout with calling ecb-redraw-layout. This is even
true, if you get messages like “wrong-type-argument window-live-p
#<window 222>”.
If the variable ecb-redraw-layout-quickly is not nil then the redraw
is done by the ecb-redraw-layout-quickly function, otherwise by
ecb-redraw-layout-full. But it's strongly recommended to use the
quick redraw only if you have really slow machines where a full redraw
takes several seconds because the quick redraw is not really safe and
may have some drawbacks! On normal machines the full redraw should be
done in << 1s!
Please read the documentation of the command ecb-redraw-layout!
See also the hooks ecb-redraw-layout-after-hook and
ecb-redraw-layout-before-hook!