[help] how to convert *.pcap to *.txt(k12txt)? editcap?

[胡 杰 <hujie () fiberhome com cn>]

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

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