aliases with rcvdist?

I'm running mh 2.8.3 on a Sparc 10 running SunOS 4.1.3.

I'm having trouble with rcvdist.

1. There's no man page for it.
2. It doesn't seem to know about aliases.
2a.  If I execute

% show | rcvdist -form rcvdistcomps.noloop m1

then it prints:
  m1: loses; [USER] 550 <m1>... User unknown
post: 1 addressee undeliverable
/usr/local/gnu/mh/lib/post: Exit 1

2b.  If I add the following line to my .mh_profile file:
rcvdist: -alias Aliases
and try the same command, I get the message:
post: missing argument to -alias
/usr/local/gnu/mh/lib/post: Exit 1


Is this a bug?  Am I using it incorrectly?  Should rcvdist be able to handle
aliases as well as normal addresses?

Thanks,
/7\'7  Steve Kelem      (408)879-5347           kelem(_at_)xilinx(_dot_)com
\\ `   Xilinx                                   FAX: (408)559-7114
//     2100 Logic Drive
\\/.\  San Jose, California 95124