Hi benny.. (1) yes u r absolutely right , OS_NAME=auto should work fine .i was always thinking that ..since my os is linux ..i have to change OS_NAME =linux...but it was giving error .... and please check all the macros in os_auto.h are undefined ... ...that is also causing error... (2) regarding using the default executable..: default executable has the following discription : pjsua-arm-unknown-linux-gnu: ELF 32-bit LSB executable, ARM, version 1 (ARM), for GNU/Linux 2.0.0, dynamically linked (uses shared libs), not stripped I don't know how to set the PATH to dynamically link the shared libs and run it on the arm target ,thats the reason i was trying to build pjsua-apps.c statically and run it on arm... do u have any idea how to run dynamically linked executable... (3) regarding RTP and RTCP Please see that in pjsua_media.c the pj_gethostip() is not taking address from hostip as it does for TCP in sip_transport_tcp.c... i am not sure about it ..but every time i run the executable it is showing that : pjsua_media.c: RTP socket reachable at 46. pjsua_media.c: RTCP socket reachable at 46. and giving error : unable to create contact header i am using the latest svn update 15-01-2008 ... please look into it... Thanks Anitha Suresh --------------------------------- Looking for last minute shopping deals? Find them fast with Yahoo! Search. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080120/22cd65d9/attachment.html