[comp.os.cpm] HELP with unarc16

rb@ist.CO.UK (News reading a/c for rb) (02/23/88)

I'm having trouble getting UNARC16.ARK to unpack itself. It
starts up ok and produces a couple of intelligible messages,
then it prints lots of noise characters across the screen and
after a bit it exits having unpacked nothing. The code looks
vaguely sane (ie I believe I've downloaded the file ok). I'm
attempting this feat on an Amstrad CPC6128 running CP/M 3.0.
Any hints, suggestions, etc? Thanx in advance...