When I open waterfall i get the following pasted below in terminal, and the waterfall doesnt do anything, do I have to open grc in terminal first somehow? thanks sean root@kali:~# ./op25_grc.py Using Volk machine: sse3_64_orc RTL2832 Source block configuration: Read length (bytes): 262 Buffer enabled: yes Buffer multiplier: 8 Buffer size (samples): 1048 Samples per read: 131 Buffer level: 50.0% Successfully initialised demod: "ezcap EzTV" Probing "e4k"...not found. Probing "fc0013"...not found. Probing "fc2580"...bad check value. Probing "r820t"...found. Found RTL2832 device: ezcap EzTV (tuner: Rafael Micro R820T) Sample rate range: 900001 - 3200000 Hz Crystal frequency: 28800000 Hz [r820t] Initialised (default bandwidth: 0 Hz) Wait delay: 0.196 ms [R820T] PLL not locked for 3570434 Hz! work wants more than the buffer size! Capture threading starting: 7f904e7fc700 rOShort bulk read: given 0 bytes (expecting 262) rBlibusb error: the device has been disconnected [-4] Capture threading aborting due to libusb error: 7f904e7fc700 No longer running after packet notification - signalling EOF...