Firmware 5447: Iterate() bug or feature?

[ColinJDenman]

In performing ITERATE(z^2+.37-.14*i,Z,0,n) for n=1001, I get
Error: Invalid input
This is true for n>1000, but doesn't appear to be noted in the
calculator help or the pdf user guide.

I note that it is possible to nest ITERATE to get beyond 1000, but it gets unpicturesque.

Is there any good reason for the limit? The manual uses the notation '#times' for n,
is that significant somehow?

I note that the form above for n=1000 times at 0.078s, compared to a nested 2000 loop
of 0.146s. A simple program JULIA using variables, runs a 1000 iteration at 0.136s, half the speed and can do 500000 in 53.485s