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Sounds like this problem is specific to one pcap file. In wireshark, I would check the destination port number in the udp header. I believe the driver expects it to be 2368. If your file has something different, you have to specify it on the command line.

Sounds like this problem is specific to one pcap file. In wireshark, I would check the destination port number in the udp header. I believe the driver expects it to be 2368. If your file has something different, you have to specify it on the command line.

I guess we now know that -2 means "no data packets found".