RX Channel Out Of Range

GNU Radio
1

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

2

Hi Azza -

We have noticed that problem if you have copied UHD source / sinks from
another flowgraph into the one you are using. Try deleting the UHD
blocks
and re-creating them in your flowgraph and see if that fixes the
problem.

There is some bug in copying those blocks between flowgraphs in GRC, I
think.

Cheers,
Ben

On Wed, Mar 12, 2014 at 2:41 PM, Azza Ben Mosbah

3

Hi Ben,

Actually, I didn’t copy them from another flowgraph.
But, I noticed there is a problem with my PYTHONPATH, which generates
this
error. When I correct it, the execution goes well.

Thank you,
Azza

4

On 13.03.2014 02:00, Azza Ben Mosbah wrote:

Hi Ben,

Actually, I didn’t copy them from another flowgraph.
But, I noticed there is a problem with my PYTHONPATH, which generates
this error. When I correct it, the execution goes well.

Interesting – could you please give some details on what the problem
was and what you did to fix it?

Martin