Hi, looking at the not-too-old (two years?) possibility of indicating an automatic function argument value, there's a little hiccup in combination with the also new numeric thing: <hansl> function void hey_num(numeric ho[auto]) # error     eval (exists(ho) ? ho : "nope") end function </hansl> Notice the error already appears at the function definition, no need to call it. This is of course a very special thing, I'm not even sure I expected it to work. On the other hand, "numeric" could be a matrix or series, and for those types it is supported. (For scalars, it's not directly supported AFAIK, because there's the traditional way of specifying an automatic default value.) thanks sven