...link to /var/spool.
If you feel like typing more commands after uustat -m, etc. I'd be interested in seeing the output of:
uustat -a
ls -li /*/spool/uucp/LCK*
uustat -p
grep 1[aA] /etc/inittab
FWIW, while typing this post I had to remove an orphaned lock file, but for a system name, not a...