Hi Alan I have downloaded freeradius 1.1.6 and configured for EAP-SIM and run successfully. but when i send a request using radeapclient to radius server i get this error " ./radiusd: symbol lookup error: /usr/local/lib/rlm_sim_files- 1.1.6.so: undefined symbol: rad_assert" I have set LD_LIBRARY_PATH, reconfigured and and rebuilt server with share disable option , but still get the same error. what is the problem, what should I do? this is log of radius ------------------------- Listening on authentication *:1812 Listening on accounting *:1813 Ready to process requests. rad_recv: Access-Request packet from host 127.0.0.1:37454, id=33, length=89 User-Name = "232420100000015" NAS-IP-Address = 255.255.255.255 Message-Authenticator = 0x42014f09257d6d91d04b6e145e251adb NAS-Port = 0 EAP-Message = 0x0220001401323332343230313030303030303135 ./radiusd: symbol lookup error: /usr/local/lib/rlm_sim_files-1.1.6.so: undefined symbol: rad_assert thanks Deepak