NFSD under OpenBSD

Hi all,
I am having a following problem. Trying to run PXE boot server on my OpenBSD machine I have ended up on making NFSd daemon works. On all machines I get an error msg. nfsd[29613] : nfsd count is invalid: (null) no matter what computer I run it on. Everything works just well on FreeBSD and linux.
Thanks for any help

Looks like you're using -n but not providing an option argument. Either don't use -n or follow it with a valid number of servers to fork.

Regards,
Alister