Trouble in Flashing to eMMC using USB blaster

[Altera_Forum]

Hi All, 

 We are trying flash the binaries to eMMC using USB-Blaster II  When I executed the below command it ends up with errors: ./flash_programmer.py --operation=epv --address=0x00000000 --size=0x00100000 --file=<path>/uboot_w_dtb-mkpimage.bin (refered as in link https://rocketboards.org/foswiki/documentation/a10gsrd161nandboot?validation_key=d0d54f947c8f6494547938d664df12c1)  Debug messages: Launching debug server [0%] [target] Starting debug server [target] Waiting for debug server to start accepting connections [target] Debug server started successfully [target]  Launching debug server [100%] [target] ERROR failed to connect to RDDI DAP target [target] RDDI Error Code 4107 : Failed to load JTAG client library "libjtag_client.so" [target] RDDI CFG = /tmp/ds5_1842063425346091758.txt [target] Debug server shutdown application [target] Debug server shutdown attempted [target] Done WARNING(DTS255): Failed to power down DAP ERROR(TAD290-DTS77-DTS1-NAL57):  ! Failed to connect to platform TCP:localhost ! Unable to connect to TCP:localhost ! Unable to connect to device DAP ! No connection to target. INFO : WARNING(DTS255): Failed to power down DAP ERROR(TAD290-DTS77-DTS1-NAL57):  ! Failed to connect to platform TCP:localhost ! Unable to connect to TCP:localhost ! Unable to connect to device DAP ! No connection to target.  ERROR: Launching debug server [0%] [target] Starting debug server [target] Waiting for debug server to start accepting connections [target] Debug server started successfully [target]  Launching debug server [100%] [target] ERROR failed to connect to RDDI DAP target [target] RDDI Error Code 4107 : Failed to load JTAG client library "libjtag_client.so" [target] RDDI CFG = /tmp/ds5_1842063425346091758.txt [target] Debug server shutdown application [target] Debug server shutdown attempted [target] Done  What could have caused this error? Has anyone faced the same problem before??  Thank you. Regards, Ambika