Thank you for providing the additional information. I would like to point out that this is an unusual scenario and I will try to answer as best as I can.
I tested the latest import file and below is the screenshot of the log output. It appears that the fragments are never reassembled. In this case, this would mean that the import wouldn't work because Fiddler can't create the new sessions.
Additionally, importing TCP traffic isn't supported since it is on a different network layer. Fiddler can only see the web application layer traffic for specific protocols like HTTP, HTTPS, FTP and WebSockets.
An option for capturing this specific traffic on the same layer for use in Fiddler might be to use Fiddler Core in the application on your embedded device.
I hope this helps. Please let me know if you need any additional information. Thank you.
Eric R | Technical Support Engineer
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