237     coap_log_warn("coap_new_node: malloc failed\n");  in coap_new_node()
480     coap_log_warn("coap_startup() should be called before any other "  in coap_new_context()
1101     coap_log_warn("coap_send: PDU dropped as token too long (%zu > %" PRIu32 ")\n",  in coap_send()
1151         coap_log_warn("Block1 and Q-Block1 cannot be in the same request\n");  in coap_send()
1435           coap_log_warn("Proxy loop detected '%s'\n",  in coap_send_internal()
1441           coap_log_warn("Proxy return has bad hop limit count '%zu'\n",  in coap_send_internal()
1471           coap_log_warn("Proxy loop detected '%s'\n",  in coap_send_internal()
1561       coap_log_warn("OSCORE: PDU could not be encrypted\n");  in coap_send_internal()
1682   coap_log_warn("** %s: mid=0x%04x: give up after %d attempts\n",  in coap_retransmit()
1851         coap_log_warn("discard malformed PDU\n");  in coap_read_session()
1922               coap_log_warn("** %s: incoming PDU length too large (%zu > %lu)\n",  in coap_read_session()
2012     coap_log_warn("*  %s: read failed\n", coap_endpoint_str(endpoint));  in coap_read_endpoint()
2229     coap_log_warn("discard malformed PDU\n");  in coap_handle_dgram()
2487     coap_log_warn("cannot determine length of /.well-known/core\n");  in get_wkc_len()
3509         coap_log_warn("coap_dispatch: cannot create error response\n");  in check_token_size()
3516           coap_log_warn("coap_dispatch: error sending response\n");  in check_token_size()
3558           coap_log_warn("coap_dispatch: cannot create error response\n");  in coap_dispatch()
3561             coap_log_warn("coap_dispatch: error sending response\n");  in coap_dispatch()
3612           coap_log_warn("OSCORE: PDU could not be decrypted\n");  in coap_dispatch()
3785           coap_log_warn("coap_dispatch: cannot create error response\n");  in coap_dispatch()
3788             coap_log_warn("coap_dispatch: error sending response\n");  in coap_dispatch()
4186           coap_log_warn("coap_join_mcast_group_intf: "  in coap_join_mcast_group_intf()
4193           coap_log_warn("coap_join_mcast_group_intf: "  in coap_join_mcast_group_intf()