Wireshark-users: [Wireshark-users] [help] how to convert *.pcap to *.txt(k12txt)? editcap?

From: 胡 杰 <hujie@xxxxxxxxxxxxxxxx>
Date: Tue, 23 Mar 2010 19:35:58 +0800
how to convert *.pcap to *.txt(k12txt) ?
 
command line:
 
"C:\Program Files\Wireshark\editcap.exe" -T k12 123.pcap 123.txt   
 
but returned :
 
Can't open or create 123.txt:Files from that network type can't be saved in that format
 
Any suggestions?  Thanks in advance.
------------------  
hujie
2010-03-23