I can't live without- just curious- is a fermata on a rest possible?

Yes, it is, just write fermata after the rest.

When I write:

(-h -q fermata)

I get:

Error: The value -h is not of the expected type number.
> While executing: abs, in process Listener-1(8).
> Type cmd-. to abort, cmd-\ for a list of available restarts.
> Type :? for other options.

thats why I was asking

You will see it in the score.

((-h -q fermata) (q c4))