update c82f/iim a set iwufi=

(select iwufi from c82f/iim b where
a.iprod=b.iprod and a.immand<>b.immand and b.immand=1 and
a.immand=11 and a.i1sdb<>' ')

where exists (select iwufi from
c82f/iim b where a.iprod=b.iprod and a.immand<>b.immand and
a.immand=11 and a.i1sdb<>' ')

Der rote Select ermttelt KEINEN Satz, daher SQL0407.