nRF Sniffer with Wireshark, Error from extcap pipe

[Mikael_2]

Hi,

I have followed the nRF Connect SDK Fundamentals and BLE Fundamental courses and come to Lesson 6 Bluetooth LE sniffer.

Everything has worked until this but now I get errors from Wireshark.
I all starts well, Wireshark starts capture ok, sniffing starts ok, but when I stop the capture I get error "Error from extcap pipe C:......"

If I try a capture filter I get errors like: "Error from extcap pipe: Acess denied" and "Unable to send control message: Invalid argument"

A careful check shows the errors already when running "nrf_sniffer_ble.bat --extcap-interfaces" during installation where
 I get "invalid escape sequence '\s' *{validation=^\s((37|38|39)s*7{1}\s$}{requires=true}" % CTRL_ARG_ADVHOP)"

See attached screen dumps.

Any idea of how to solve this?

[Felix Shih]

Using older python version sometimes avoid the error, I use python v3.9.

But I am not sure it's your root cause.

[Mikael_2]

I use latest python 3.13.0 Maybe too new?