After compiling and installing ptlib 2.8.1 and h323plus, mod_h323 compile and build fine in FS. Now, when FS try to load mod_h323 it failed with the following error: 2010-09-19 00:58:12.743034 [CONSOLE] switch_loadable_module.c:944 Successfully Loaded [mod_sofia] 2010-09-19 00:58:12.743064 [NOTICE] switch_loadable_module.c:145 Adding Endpoint 'sofia' 2010-09-19 00:58:12.743105 [NOTICE] switch_loadable_module.c:273 Adding API Function 'sofia' --- --- module.c:422 Adding Management interface 'mod_sofia' OID[.1.3.6.1.4.1.27880.1] 2010-09-19 00:58:12.744107 [CONSOLE] switch_loadable_module.c:944 Successfully Loaded terminate called after throwing an instance of '__gnu_cxx::__concurrence_unlock_error' what(): __gnu_cxx::__concurrence_unlock_error -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/mod-h323-build-fine-but-FS-can... Sent from the freeswitch-users mailing list archive at Nabble.com.