title: Error: Protocol not available, dumping backtrace
body: <pre><code>2016-09-17 15:16:04.386085 appDemo[2371:94976] [] __nwlog_err_simulate_crash simulate crash already simulated **"nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available"**
  2016-09-17 15:16:04.386676 appDemo[2371:94976] [] nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available, dumping backtrace:
          [x86_64] libnetcore-856.1.8
      0   libsystem_network.dylib             0x0000000112dc780e __nw_create_backtrace_string + 123
      1   libnetwork.dylib                    0x0000000113bfa194 nw_socket_add_input_handler + 3002
      2   libnetwork.dylib                    0x0000000113bd7db8 nw_endpoint_flow_attach_protocols + 3768
      3   libnetwork.dylib                    0x0000000113bd6dd5 nw_endpoint_flow_setup_socket + 563
      4   libnetwork.dylib                    0x0000000113bd5b34 -[NWConcrete_nw_endpoint_flow startWithHandler:] + 2612
      5   libnetwork.dylib                    0x0000000113bf0d11 nw_endpoint_handler_path_change + 1261
      6   libnetwork.dylib                    0x0000000113bf0740 nw_endpoint_handler_start + 570
      7   libdispatch.dylib                   0x0000000112b44980 _dispatch_call_block_and_release + 12
      8   libdispatch.dylib                   0x0000000112b6e
  2016-09-17 15:16:04.387153 appDemo[2371:94976] [] nw_endpoint_flow_attach_protocols [2 192.168.0.100:80 in_progress socket-flow (satisfied)] Attached flow protocol
  2016-09-17 15:16:04.387679 appDemo[2371:94976] [] nw_connection_endpoint_report [2 192.168.0.100:80 in_progress socket-flow (satisfied)] reported event flow:start_connect
  </code></pre>
  
  <p>I'm using <code>xcode 8</code> version with <code>ios 10</code>. Now, I'm working an API. If, I use the API in <code>Xcode 7</code> its works fine but when same API I used in <code>xcode 8</code> error message appears Unable to parse.</p>