open bsc and lcr: layer_3 thread read socket error

Hello, my name is Richard and I am working on OpenBSC and LCR for my university. We plan to deploy a GSM-Network on the campus for research. We have successfully installed OpenBSC, Asterisk, LCR and mISDN. Lcr starts correctly (as far as I can say). The nanoBTS connects to OpenBSC and boot up. On the local machine, we can place outgoing calls with asterisk but when we dial from the cellphones, the lcr prints out: "layer3_thread read socket error No space left on device". I don't know if this is an error in LCR, OpenBSC, mISDN or just in my own config files. We ran through the How-to "OpenBSC_LCR" on http://openbsc.osmocom.org/trac/wiki: gsm is enabled in options.conf GSM interface is active in interface.conf mISDN_l1loop interfaces are created and the routing.conf looks also as described: ----------------------routing.conf (lcr)---------------------- [main] interface=GSM : remote application=asterisk context=btsctrl #interface=xyz : goto ruleset=xyz extern : goto ruleset=extern intern : goto ruleset=intern : disconnect cause=31 ------------------------------------------------------------- the rest of the file is untouched. on the local asterisk, the chan_lcr.so is loaded. the context btsctrl is defined is the extensions.conf: ----------------------extension.conf (asterisk)-------------- [default] exten => _0.,1,Dial(SIP/10${EXTEN}@comsys02) [btsctrl] exten => _X.,1,Set,CALLERID(num)=5552342 exten => _X.,n,dial(SIP/10${EXTEN}@comsys02) ------------------------------------------------------------- it connects to the remote asterisk server as user comsys02, defined in sip.conf ----------------------sip.conf (asterisk)-------------------- register => comsys02:xxx@132.230.4.8/comsys02 [general] port=5060 bindaddr=0.0.0.0 [btsctrl] type=friend context=default secret=xxx host=dynamic [comsys02] type=friend context=btsctrl username=comsys02 fromuser=comsys02 secret=xxx host=132.230.4.8 qualify=yes nat=yes ------------------------------------------------------------- now everything seems to work, but when i dial a number, it prints out: "layer3_thread read socket error No space left on device", many times per second. On the phone I hear static noise. lcradmin prints out the following: ACTION (match) action remote line 8 EP(1): ACTION remote (setup) number 076719235 remote as* EP(1): SETUP ACKNOWLEDGE to CH(1) EP(1): TONE to CH(1) directory default name dialing EP(1): TONE to CH(1) directory default name cause_10 EP(1): DISCONNECT to CH(1) cause value=16 location=1-Lo* CH(1): MNCC_DISC_REQ LCR<-BSC port 1 progress coding=3 * CH(1): MNCC_REL_IND LCR<-BSC port 1 cause coding=0 loca* EP(1): RELEASE from CH(1) cause value=31 location=1-Loc* EP(1): ACTION hangup and the local asterisk output is: NOTICE[10941]: chan_lcr.c:1731 handle_retry: [call=NULL ast=NULL] Retry to open socket. NOTICE[10941]: chan_lcr.c:364 send_message: [call=NULL ast=NULL] Sending MESSAGE_NEWREF to socket. maybe someone also encountered this problem or can help us with the configuration many thanks in advance and best regards, richard