Ethereal-users: Re: [Ethereal-users] Unkown protocol - WTAP_ENCAP = 1???

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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Fri, 24 Oct 2003 11:40:14 -0700

On Oct 24, 2003, at 12:35 AM, jim car wrote:
I installed WinPcap and Ethereal on a NT4 machine and verified that it was working correctly. However, another person was using Ethereal and an error came up. Unfortunately, I don't know what the error was since he didn't read it and just entered thru the pop-ups. Since then ethereal is reporting the protocol as unknown and info as wtap_encap=1. This machine has nothing running on it except ethereal.
I tried viewing a tcpdump from several days ago that I know was good and it comes out the same way. 

I have absolutely no idea what happened.

Try un-installing Ethereal and re-installing it.