bug in lrzsz

[silica]

I have installed the package lrzsz and picocom like this:

$sudo apt-get install picocom lrzsz

I am triyng to boot my beaglebone black board from UART. So, I have to send U-boot file to it. I followed these steps:

$picocom -b 115200 /dev/ttyUSB0 --send-cmd "sx -vv"

picocom v1.7

port is : /dev/ttyUSB0
flowcontrol : none
baudrate is : 115200
parity is : none
databits are : 8
escape is : C-a
local echo is : no
noinit is : no
noreset is : no
nolock is : no
send_cmd is : sx -vv
receive_cmd is : rz -vv
imap is :
omap is :
emap is : crcrlf,delbs,

Terminal ready

Then I pressed CTRL +a +s to send a file. I see :

*** file:

I entered the file name and pressed ENTER key. I see the following message:

*** file: u-boot-spl.bin
sx-vv u-boot-spl.bin
sh: 1: sx-vv: not found

*** exit status: 127

I seems that the sx option i snot working or something like that.

Any help please.