Hi Everyone, What is the reason for these warnings? Somehow my rfnoc block and/or image/software/compile has resulted in these again, and I can't nail it down to something. Some symptoms are an rx_streamer that receives a few 100 Mb of data, but then stalls. I can see in wireshark that data packets of the correct size flow from both 10 gbe ports - but stop quite soon after starting, and after that just a stream of some sort of control and ack packets. Regards, Kevin O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! L[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request from RxStreamer#0:INPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request from RxStreamer#0:INPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request from RxStreamer#0:INPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request from RxStreamer#0:INPUT_EDGE:0, no neighbour found! O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! L[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from 0/Radio#0:OUTPUT_EDGE:0, no neighbour found!

Kevin, I'm assuming your flow graph is a variation of Radio -> [Your Block] -> Rx Streamer. When the radio suffers an overrun (as it does here), it will send a message downstream. If the last block downstream is an Rx Streamer, and you are in continuous streaming mode, it will try to restart the stream; the streamer and the radio have a handshake protocol for this. Now my guess is that your block is doing something with the action handling. Maybe you set your action forwarding policy to ONE_TO_ALL, or the topology is a bit more complex than I thought. But most likely, the streamer and radio are able to do their action handshake thing, but your block is forwarding messages to unconnected ports or something like that. --M On Sat, Jun 28, 2025 at 1:38 AM Kevin Williams <kevin.williams@vastech.co.za> wrote: > Hi Everyone, > > > > What is the reason for these warnings? > > > > Somehow my rfnoc block and/or image/software/compile has resulted in these > again, and I can’t nail it down to something. > > > > Some symptoms are an rx_streamer that receives a few 100 Mb of data, but > then stalls. > > > > I can see in wireshark that data packets of the correct size flow from > both 10 gbe ports – but stop quite soon after starting, and after that just > a stream of some sort of control and ack packets. > > > > Regards, Kevin > > > > O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! > > L[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request > from RxStreamer#0:INPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request > from RxStreamer#0:INPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request > from RxStreamer#0:INPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action restart_request > from RxStreamer#0:INPUT_EDGE:0, no neighbour found! > > O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > O[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:1, no neighbour found! > > L[WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > [WARNING] [RFNOC::GRAPH::DETAIL] Cannot forward action rx_event from > 0/Radio#0:OUTPUT_EDGE:0, no neighbour found! > > > > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-leave@lists.ettus.com >