Receiver Error

Hi, I have resolve some of my previous issue and from few days i am stuck on following problem: *********************************** root@sadi:/home/zia/osmo-gmr/utils/gmr_multi_rx# ./gmr_multi_rx --gmr1-dl 978 -a RX2 -S A:0 --addr=usrp2 -T 10 linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.006.002-rc2 Given gmr1-dl ARFCNs: 978 = 1555.562500 MHz Required bandwidth is: 31.250000 kHz Creating the UHD device... -- Opening a USRP2/N-Series device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes -- Detecting internal GPSDO.... Found a Jackson Labs GPS -- found -- Detecting internal GPSDO.... Found a Jackson Labs GPS -- found -- Detecting internal GPSDO.... Found a Jackson Labs GPS -- found terminate called after throwing an instance of 'uhd::runtime_error' what(): RuntimeError: fifo ctrl timed out looking for acks Aborted (core dumped) root@sadi:/home/zia/osmo-gmr/utils/gmr_multi_rx# *********************************************************************************************** Going through GMR mailing list I have found that you posted same problem in Oct-2012. I have follow the Mr,Sylvain advice and run uhd_fft utility, that is working fine and showing signal on screen. Can u plz guide me how to resolve this issue. (i am using Ubuntu 12.04 OS). Thanxs Zia