OsmocomBB

OS:
ubuntu 16.04 Linux bogon 4.4.0-21-generic #37-Ubuntu SMP
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after git clone osmocombb ,use luca/gsmmtap/ branch with modify c118 phone to sniffer gsm uplink information , run make ,compile successful.
then run:

# ./osmocon -m c123xor -p /dev/ttyUSB0 ../../target/firmware/board/compal_e88/layer1.compalram.bin

when upload success,it appears blew content,hangs.

PM MEAS: ARFCN=1023, 45   dBm at baseband, -92  dBm at RF
L1CTL_RESET_REQ: FULL!L1CTL_FBSB_REQ (arfcn=94, flags=0x7)

_# ./ccch_scan -i 127.0.0.1 -a 87
Copyright (C) 2010 Harald Welte <laforge@gnumonks.org>
Contributions by Holger Hans Peter Freyther

License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Failed to connect to '/tmp/osmocom_sap'.
Failed during sap_open(), no SIM reader_

wireshark cannot receive any gsm packet.

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how to find the reason ?
may be

1. 1.oscomcon -m parameter
2. use wrong branch to use modify c118 to sniffer uplink gsm packet?

thanks for any advice.