This IPv4 address is being used by another interface or VIP

[rt_rex]

My alix is in

2.1-RC0 (i386)
built on Fri Jun 14 04:25:00 EDT 2013
FreeBSD 8.3-RELEASE-p8

I just had this message on my ath0 , i checked webgui and ifconfig my ip addresses are unique on every interface.

I found this post below and the solution was a new snapshot

http://forum.pfsense.org/index.php/topic,58879.msg315997/topicseen.html#msg315997

[cmb]

That IP has to exist either in the config (grep x.x.x.x /cf/conf/config.xml) or ifconfig output.

[rt_rex]

@cmb:

That IP has to exist either in the config (grep x.x.x.x /cf/conf/config.xml) or ifconfig output.

I found it only in the grep x.x.x.x /cf/conf/config.xml

Edit:

my pptp server gateway add the same gateway as my interface.
After i changed it no more problems.