Hi, not sure how to help -- I just ran it without issues. Maybe double-check you have all the right versions installed?
--M On Fri, Jan 24, 2025 at 11:45 AM Abhiram Prakash Alamuri < abhiramalam...@gmail.com> wrote: > Greetings, > > I’m trying to open the RFNoC example file titled rfnoc_radio_loopback.grc, > available at > https://github.com/gnuradio/gnuradio/blob/main/gr-uhd/examples/grc/rfnoc_radio_loopback.grc. > However, > the file doesn’t open in GNU Radio Companion, and I receive the following > error: > > >>> Error: Connection between blocks_var_to_msg_0(msgout) and > >>> uhd_rfnoc_rx_radio_0(command) could not be made. > sink key 'command' not in sink block keys > Error: too many values to unpack (expected 4) > >>> Failure > > As a beginner, I’m unsure about the underlying cause of the issue. Could > it be due to the example using deprecated or unsupported blocks in the > latest version of GNU Radio? For context, I use a URSP X300, GNURadio > version 3.10.7.0, UHD version UHD 4.2.0.HEAD-0-g46a70d85. > > I have all the necessary hardware prerequisites for running RFNoC on my > USRP. I uploaded the FPGA image 39, which was released by Ettus research, > onto my USRP. I even successfully ran various RFNoC GRC files on my system, > including the DDC and DUC examples from the GitHub repository. For > instance, when I executed the rfnoc_radio_ddc.grc example, I connected a > signal generator to my SDR using a coaxial cable to input a sinusoidal > signal. On running the flowgraph, I observed the sinusoid on the QT GUI > Time Sink and its accurate spectrum on the Frequency Sink, confirming > proper signal generation and analysis with RFNoC. > > The only issue is with the rfnoc_radio_loopback.grc file, which is the > most important one for me at the moment, and I am unable to run that. > > Any guidance or suggestions on how to resolve this would be greatly > appreciated. > > Thanks in advance! > > >
