Hi, I have added this in mod_radius_cdr.c and run make&make install. if (channel){ const char *no_radius_start = switch_channel_get_variable(channel, "no_radius_start"); if (switch_true(no_radius_start)){ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "[mod_radius_cdr] Skipping Radius Start\n"); return SWITCH_STATUS_SUCCESS; } } and for radius_stop. if (channel){ const char *no_radius_stop = switch_channel_get_variable(channel, "no_radius_stop"); if (switch_true(no_radius_stop)){ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "[mod_radius_cdr] Skipping Radius Stop\n"); return SWITCH_STATUS_SUCCESS; } } When I run call a get this: Segmentation fault (core dumped) Do you know why I am getting this? Regrdas, Miha