L1 corruption?

Hi. I'm trying to follow the logic described in app_ccch_scan to send RACH bursts to my openbts. First 2-2 goes fine but after that I got constant errors - see below. It looks like after I've sent couple of packets something got corrupted in L1. How can I debug this and understand what causing all the errors? LOG: <0001> app_rach_send.c:227 registering signal handler... <0001> app_rach_send.c:229 resetting L1... <0001> app_rach_send.c:231 L3 init... <0001> app_rach_send.c:190 requesting FBSB from L1... <0001> app_rach_send.c:200 unhandled callback 1 <S_L1CTL_FBSB_RESP> fired... <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:73 SI2 on the wrong TC: 0 <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:75 SI3 on the wrong TC: 0 <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:75 SI3 on the wrong TC: 0 <0001> app_rach_send.c:200 unhandled callback 5 <S_L1CTL_CCCH_MODE_CONF> fired... <0001> app_rach_send.c:200 unhandled callback 5 <S_L1CTL_CCCH_MODE_CONF> fired... <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:86 SI4 on the wrong TC: 0 <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:86 SI4 on the wrong TC: 0 ... <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:86 SI4 on the wrong TC: 0 <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:70 SI1 received. <0001> app_rach_send.c:127 sending RACH #0 on ARFCN 21... <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:127 sending RACH #1 on ARFCN 21... <0001> app_rach_send.c:111 obtained BCCH, dumping... <0001> app_rach_send.c:127 sending RACH #2 on ARFCN 21... <0000> rslms.c:136 unknown RSLms msg_discr 0x0c <0000> rslms.c:136 unknown RSLms msg_discr 0x0c <0000> rslms.c:136 unknown RSLms msg_discr 0x0c <000b> l1ctl.c:210 Dropping frame with 80 bit errors <000b> l1ctl.c:210 Dropping frame with 80 bit errors <000b> l1ctl.c:210 Dropping frame with 80 bit errors <000b> l1ctl.c:210 Dropping frame with 59 bit errors <000b> l1ctl.c:210 Dropping frame with 59 bit errors <000b> l1ctl.c:210 Dropping frame with 59 bit errors <000b> l1ctl.c:210 Dropping frame with 58 bit errors <000b> l1ctl.c:210 Dropping frame with 58 bit errors <000b> l1ctl.c:210 Dropping frame with 58 bit errors <000b> l1ctl.c:210 Dropping frame with 61 bit errors <000b> l1ctl.c:210 Dropping frame with 61 bit errors <000b> l1ctl.c:210 Dropping frame with 61 bit errors <000b> l1ctl.c:210 Dropping frame with 62 bit errors <000b> l1ctl.c:210 Dropping frame with 60 bit errors <000b> l1ctl.c:210 Dropping frame with 61 bit errors <000b> l1ctl.c:210 Dropping frame with 61 bit errors