Hello again, I think the introduction of the array type kind of begs for an extension of the "foreach" loop variant. Something like this: <hansl> matrices Ms = array(3) loop foreach i Ms $i = I(2) endloop </hansl> I'm aware that the same thing could be achieved with <hansl> matrices Ms = array(3) loop i=1..nelem(Ms) Ms[i] = I(2) endloop </hansl> so this is syntactic sugar and I admit that I'm influenced by Python's "iterables" concept or whatever it's called. One longer-term argument in favor of more "foreach" usage could be that such a loop is almost by definition "parallelizeable"; it could be taken to mean that the individual loop iterations are independent from each other. I think something similar is happening with R's foreach package. thanks, sven