CC2640R2F: ti serial bootloader (cc13xx-sbl) download failed 82% always

Hi Ti engineer:

  I using :

H/W : CC2640R2 Launchpad.

S/W : TI 15.4 SDK cc13xx-sbl example build on Linux without modification

   But when test the cc13xx-sbl always stop error @82% progress.

Can you help me out of this issue ?

 sudo ./host_cc13xx-sbl /dev/ttyUSB0 ble5_project_zero_cc2640r2lp_app.hex cc26x0 -e -p -v

Best Regards,
William