On Sat, 2 May 1998 18:21:12 -0700,
Roger Fischer <roger@badger1.net> wrote:
> 
> can't set defaultroute: file already exists

Don't you have the variable defaultroute set in /etc/rc.conf?
If you do, unset it to "".

If you don't, I'm not sure why default route exists when pppd expects
it not to exist.  But you can delete the route by:

route delete default

Maybe you can put this at the top of your script.

Hope this helps,

Ken