Hey David,

no, more bleeding edge than 3.7.10.1 wouldn't sound recommendable.

At the moment, I don't have much idea what could be wrong with your
UDP-based source. What else is in the flow graph, or is it just the null
sink? Any message connections?

Best regards,

Marcus


On 19.12.2016 16:59, David Kersh wrote:
> Dear Marcus,
>
> Excellent news!
>
> I've just installed 3.7.10.1 and my flow graph still doesn't appear to
> end (but my UDP server block stops because it won't receive anymore
> packets after returning -1). Currently I have a basic flowgraph which
> has my server block running alongside a symbol noise source and
> frequency visualisation sink.
>
> Do you recommend using one of the bleeding edge releases?
>
> Many Thanks
> David
>
> On Mon, Dec 19, 2016 at 1:08 PM, Marcus Müller
> <[email protected] <mailto:[email protected]>> wrote:
>
>     Hi David,
>
>     that worked :)
>
>     yep, returning -1 (which is the magical value for "there's nothing
>     coming anymore, you can shut down") would normally end a flow graph.
>
>     However, we've had (still have) problems with the shutdown logic,
>     but people recently patched a lot of things – so whatever you do,
>     please make sure you're using the current release of GNU Radio.
>     Which is it that you're currently using?
>
>     Best regards,
>
>     Marcus
>
>
>     On 19.12.2016 12:45, David Kersh wrote:
>>     Hello all, 
>>
>>     I've created a custom out of tree source block which listens for
>>     UDP packets and does different things depending on the received
>>     packet. It is connected to a NULL sink because I haven't quite
>>     worked out how to make a standalone UDP Server (and I've found
>>     the tutorials to be very confusing unfortunately). 
>>
>>     When the packet is "stop", I would like the flowgraph to be
>>     stopped. I've seen from researching different forums that
>>     if *-1* is returned, the flowgraph is supposed to stop but I only
>>     find that this stops my block from running, the rest of the
>>     flowgraph continues running. 
>>
>>     Is there not a simple command which I can use to kill the whole
>>     flowgraph? 
>>
>>     An alternative solution I tried to implement was to access these
>>     values using a /vector sink/ block and the .data() method from
>>     the top_block.py
>>     This didn't seem to work correctly as Python's UDP calls block.
>>
>>     Thank you, hopefully I've made this post properly. I'm quite new
>>     to programming with GNURADIO.
>>
>>     David
>>
>>
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