PCU socket has LOST connection

Dear All,   I try to run a virtual BTS:   systemctl start osmo-stp systemctl start osmo-hlr systemctl start osmo-msc systemctl start osmo-bsc   and finally i run osmo-bts-virtual…. but i am getting following outcome:   DOML <0001> oml.c:91 OC=GPRS-CELL INST=(00,ff,ff): Sending PCU version report to BSC: PCU socket has LOST connection DPCU <0009> pcu_sock.c:1084 PCU socket connected to external PCU DPCU <0009> pcu_sock.c:967 Received 212 bytes on PCU Socket, but primitive size is 1006, discarding DPCU <0009> pcu_sock.c:895 PCU socket has LOST connection   I tried to run osmo-pcu (I thought may be this will resole above issue) but it keeps saying:   <000b> gprs_ns.c:322 NSVCI=65534 Creating NS-VC with Signal weight 1, Data weight 1 <000e> telnet_interface.c:104 Available via telnet 127.0.0.1 4240 <0001> osmobts_sock.cpp:224 Opening OsmoPCU L1 interface to OsmoBTS <0001> osmobts_sock.cpp:248 osmo-bts PCU socket /tmp/pcu_bts has been connected <0001> pcu_l1_if.cpp:114 Sending 0.8.0 TXT as PCU_VERSION to BTS PCU interface version number of BTS (10) is different (9). Please re-compile!   I have OsmoPCU version 0.8.0 OsmoBTS version 1.2.0.307-6e27     Would you kindly advise whats going on please….   As i understand osmo-pcu is to implement GPRS into my GSM network… ok but if i dont want GPRS implemented thus i dont need PCU …. can i run virtual bts without this PCU things ?   pls help …..       -- Mario Lucas