[lowrisc-dev] Problem running a debug session on FPGA

Hi, I am trying to run a debug session on FPGA as described on http://www.lowrisc.org/docs/debug-v0.3/fpga/. After programming the nexys4ddr board with the provided debug enabled FPGA bitstream, following error is encountered while trying to open the debug daemon: $ opensocdebugd uart device=/dev/ttyUSB1 speed=12000000 Open SoC Debug Daemon Backend: uart opensocdebugd: ../../src/regaccess.c:60: osd_reg_read16: Assertion `packet[0] == 3' failed. Aborted (core dumped) $ Could you please identify what's going wrong here. Thanks, Imran Wali