Internet Sharing - Error Creating Bridge100@0

Hello,
I'm trying to set up internet sharing but I am havign some problems.
On closer inspection of the log I can see the following error:
com.apple.InternetSharing[2440]: error creating internal interface for devname bridge100@0: Address already in use
If I do the follwoing:
#ifconfig | grep bridge
I only see bridge0 not bridge100 ?
How can I find out what is using bridge100 and why is it in use!
TIA//56k

I have spent afew hours looking at this and I have eneded up looking at LaucnhDaemons... I killed off the bootps LaunchDaemon and things seemed to start working:
sudo /bin/launchctl unload -w /System/Library/LaunchDaemons/bootps.plist
Why or what it's doing I don't know... but this fixed it.

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