bootpd: devctl() SIOCSARP failure

I am trying to make a network boot. Here is my /etc/bootptab file:

global.dummy:
:hd=/boot:
:bf=null:
:sm=255.255.255.0:

CP303:tc=global.dummy:ht=ether:ha=00.80.82.33.04.84:
:ip=192.9.200.140:bf=/boot/fs/CP303.ifs:

When remote client boots it shows the following information and stops forever:

ROM segment 0xd000 length 0x8000 reloc 0x9400
Etherboot 5.0.4 (GPL) Tagged ELF (Free BSD) (Multiboot) a.out for [EEPRO100]
Probing… [EEPRO100]Ethernet addr: 00:80:82:33:04:84
Searching for server (DHCP)…
Me: 192.9.200.140, Server: 192.9.200.12, Relay: 192.9.200.12, Gateway: 192.9.200.12
Loading 192.9.200.12:/boot/fs/CP303.ifs

The bootpd writes the following information to /var/log/syslog:

Feb 19 12:04:52 nto bootpd[6553634-1]: bootpd 2.2.D #48: Thu Nov 06 16:06:21 EST 1997 root@node256://61/src/usr.ucb/bin/bootpd
Feb 19 12:04:52 nto bootpd[6553634-1]: reading “/etc/bootlan”
Feb 19 12:04:52 nto bootpd[6553634-1]: read 2 entries (1 hosts) from “/etc/bootptab”
Feb 19 12:05:19 nto bootpd[6553634-1]: request from Ethernet address 00:80:82:33:04:84
Feb 19 12:05:19 nto bootpd[6553634-1]: found 192.9.200.140 CP303
Feb 19 12:05:19 nto bootpd[6553634-1]: trying /boot/fs/CP303.ifs.CP303
Feb 19 12:05:19 nto bootpd[6553634-1]: trying /boot/fs/CP303.ifs
Feb 19 12:05:19 nto bootpd[6553634-1]: /boot/fs/CP303.ifs has size 576000
Feb 19 12:05:19 nto bootpd[6553634-1]: devctl SIOCSARP failed: File exists

This is my first experience with the bootpd. I wouldn’t wonder if I’m doing something wrong.

Sincerely,
Serge