when mine does that i empty the drain filter at the bottom left of the machine. its a bit faffy and takes a while to empty before you can remove the filter, but it usually does the trick. once or twice i've had to retrieve baby socks from just behind the filter too.
the book says it could be the drain hose kinked or clogged too, but its never been the problem for me.
othere that the OE message every couple of months its been a good machine, had it 2 years and it washes for 8 of us.