> Could you perhaps share your Gnu Radio file--did you use GRC to do this?
The GRC file is attached. UHD-3.9.0 was used ealier, the flow graph runs without error, but abnormally (not simultaneously receiving and transmitting as intended) When update uhd to UHD-3.10.2, the error phenomenon is the same, but there is an error message printed as bellow (the error is printed after runing for several seconds): thread[thread-per-block[2]: <block gr uhd usrp sink (2)>]: EnvironmentError: IOError: Failed to sync DACs! EnvironmentError: IOError: [0/Radio_0] user_reg_read32() failed: EnvironmentError: IOError: [0/Radio_0] sr_read32() in uint64_t ctrl_iface_impl::wait_for_ack(bool) at /home/yang/uhd/uhd_3.10.2.0-release/lib/rfnoc/ctrl_iface.cpp:205
multi_usrp_test.grc
Description: Binary data
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