I´m new on raspberry

Im trying to read mbus with raspberry (Raspbian SO), and save that data on a mysql server.

I tried to follow this guide,but when i try to execute

mbus-serial-scan -b 2400 /dev/ttyAMA0

Instead of answering this:

Found a M-Bus device at address 0

My Terminal gives me this:

Scan failed. Could not send ping frame: 
mbus_serial_send_frame: Failed to write frame to socket (ret = 0: Success)
mbus_send_ping_frame: failed to send mbus frame.

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