The -refedit command seems to need a point to find the block, instead of a name or selection. I tried to feed it with the insertion point of a block that I have selected, but this only works when the insertion point is on an item in the block.
Just using a point is no option, because I would like to change my UCS according the block with something like (command "UCS" "e").
(setq pt (getpoint "Select Block: "))
(command "-refedit" pt "o" "a" "y")
Anybody an idea how to select a block and do a refedit on it?