approx(Ans) oddity

[BruceH]

Here's some more weirdness...

Go into Home mode and do Ans(8), say, when the stack is empty or has fewer than 8 levels and you get "Error: invalid input" as you'd expect.

Now do 'approx(Ans(8))' when the CAS stack is empty or has fewer than 8 levels. The answer you get is the same as 'approx(Ans)'.

Looks like Ans is treated as an array in Home mode but not in CAS mode.

I think we should have a go at trying to reach a consensus on what we think should happen so that if/when Moravia get a chance to do some bug fixing, we can at least be ready to show them what we'd like to see happen regarding Ans and Ans().