Hi, I am using an X310 device and I have freshly install RFNoC 4, (Vivado 2019.1, UHD 4.0, GNU Radio 3.8, gr-ettus )using the migration guide
(https://kb.ettus.com/RFNoC_4_Migration_Guide#Prerequisites). I tried to build a simple GNU Radio flowgraph GNU Radio source signal (cosine) -> RFNoC TX streamer -> RFNoC Radio. But when I run the graph I obtain the following error: "/usr/local/lib/python3/dist-packages/ettus/ettus_swig.py", line 1584, in make return _ettus_swig.rfnoc_tx_streamer_make(graph, num_chans, stream_args, vlen) RuntimeError: LookupError: KeyError: [convert] Cannot find an item size for: `' Do you have any idea where it should come from. Best Regards Cherif Below is the full tx script
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