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I have an Ettus E310 from which I send some data via ZMQ to a computer. On the remote computer I am running a Qt GUI in which I am displaying a FFT and a variable.
After about an hour, the GUI needs a restart because it blocks (sometimes the FFT freezes and sometimes the variable does not update). Why?
To update the variable I am using a thread in which a variable_function_probe is used.

What is more, the memory and the cpu are not used in excess.

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    $\begingroup$ That'll need a lot of debugging that would be very hard to do here. I'd recommend writing an email to the GNU Radio mailing list (discuss-gnuradio@gnu.org); you'd need to sign up for that here. $\endgroup$ – Marcus Müller May 16 at 18:51

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