Why do I get an error with this tshark command line on Windows?

edit

thx, the capture.pcap file ist 100% ok. I see Port 12345 and 18677. I like killing 18677.

tshark -r C:\chat\capture.pcap -T fields -e data "tcp.srcport==18677" > C:\chat\outbound2.txt I do not get an error message. outbound2.txt the file is empty

My target is:`$ cat outbound2.txt

42494e58

0000000d

00000347

00

057573657231044f4e595800`

It would seem that your capture doesn't have any packets that have a source port of 18677. Try using "tcp.port==18677" as a filter to see traffic to or from that port.