Hi All,

I am using GNU Radio Companion version 3.6.2.
When I execute a simple flowgraph (containing two blocks: USRP Source and
WX GUI FFT Sink), it generates the following error:

*RuntimeError: LookupError: IndexError: multi_usrp: RX channel 214957620880
out of range for configured RX frontends*


Note that when I execute a flowgraph that does not deploy USRP, it works
fine.

Does anyone have an idea how to fix this error?
Any help is appreciated. Thank you.

Regards,
Azza
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