Linphone for Windows Phone Crash - System.Exception: The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)


I get the git source code for Windows Phone (linphone-wp). I pass all steps from readme file and successfully compiled the project. I'm using Visual Studio 2013. I deploy the application. I can access any screen, but after I enter valid connection data for a real SIP account and after success register with a SIP account I receive this error and application crash:

   {System.Exception: The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)
   at Linphone.Core.OutOfProcess.Server.get_LinphoneCore()
   at Linphone.Model.LinphoneManager.get_LinphoneCore()
   at Linphone.Dialer.IsAccountConfigured()
   at Linphone.Dialer.BuildLocalizedApplicationBar()
   at Linphone.Dialer.OnNavigatedTo(NavigationEventArgs e)
   at Microsoft.Phone.Controls.PhoneApplicationPage.InternalOnNavigatedTo(NavigationEventArgs e)
   at Microsoft.Phone.Controls.PhoneApplicationPage.Microsoft.Phone.Controls.IPhoneApplicationPage.InternalOnNavigatedToX(NavigationEventArgs e)
   at System.Windows.Navigation.NavigationService.RaiseNavigated(Object content, Uri uri, NavigationMode mode, Boolean isNavigationInitiator, IPhoneApplicationPage existingContentPage, IPhoneApplicationPage newContentPage)
   at System.Windows.Navigation.NavigationService.CompleteNavigation(DependencyObject content, NavigationMode mode)
   at System.Windows.Navigation.NavigationService.<>c__DisplayClass7.<NavigateCore_StartNavigation>b__4()}

After enabling Native code debug mode:

First-chance exception at 0x6B319D91 (libantlr3c.dll) in HeadlessHost.exe: 0xC0000005: Access violation reading location 0x00000034.
Unhandled exception at 0x6B319D91 (libantlr3c.dll) in HeadlessHost.exe: 0xC0000005: Access violation reading location 0x00000034.

Call stack:

libantlr3c.dll!toStringSS(ANTLR3_TOKEN_STREAM_struct * ts, unsigned int start, unsigned int stop) Line 569  C
libantlr3c.dll!toStringTT(ANTLR3_TOKEN_STREAM_struct * ts, ANTLR3_COMMON_TOKEN_struct * start, ANTLR3_COMMON_TOKEN_struct * stop) Line 584  C
belle-sip_no_tunnel.dll!synpred1_belle_sip_message_fragment(belle_sip_messageParser_Ctx_struct * ctx) Line 202429   C
belle-sip_no_tunnel.dll!synpred1_belle_sip_message(belle_sip_messageParser_Ctx_struct * ctx) Line 203391    C
belle-sip_no_tunnel.dll!dfa2_sst(belle_sip_messageParser_Ctx_struct * ctx, ANTLR3_BASE_RECOGNIZER_struct * recognizer, ANTLR3_INT_STREAM_struct * is, ANTLR3_CYCLIC_DFA_struct * dfa, int s) Line 58555 C
libantlr3c.dll!antlr3dfapredict(void * ctx, ANTLR3_BASE_RECOGNIZER_struct * rec, ANTLR3_INT_STREAM_struct * is, ANTLR3_CYCLIC_DFA_struct * cdfa) Line 99    C
belle-sip_no_tunnel.dll!common_request(belle_sip_messageParser_Ctx_struct * ctx) Line 165724    C
belle-sip_no_tunnel.dll!message_raw(belle_sip_messageParser_Ctx_struct * ctx, unsigned int * length) Line 165540    C
belle-sip_no_tunnel.dll!belle_sip_message_parse_raw(const char * buff, unsigned int buff_length, unsigned int * message_length) Line 133    C
belle-sip_no_tunnel.dll!belle_sip_channel_parse_stream(belle_sip_channel * obj, int end_of_stream) Line 509 C
belle-sip_no_tunnel.dll!belle_sip_channel_process_stream(belle_sip_channel * obj, int eos) Line 543 C
belle-sip_no_tunnel.dll!belle_sip_channel_process_read_data(belle_sip_channel * obj) Line 576   C
belle-sip_no_tunnel.dll!belle_sip_channel_process_data(belle_sip_channel * obj, unsigned int revents) Line 598  C
belle-sip_no_tunnel.dll!on_udp_data(belle_sip_udp_listening_point * lp, unsigned int events) Line 190   C
belle-sip_no_tunnel.dll!belle_sip_main_loop_iterate(belle_sip_main_loop * ml) Line 448  C
belle-sip_no_tunnel.dll!belle_sip_main_loop_run(belle_sip_main_loop * ml) Line 478  C
belle-sip_no_tunnel.dll!belle_sip_main_loop_sleep(belle_sip_main_loop * ml, int milliseconds) Line 490  C
belle-sip_no_tunnel.dll!belle_sip_stack_sleep(belle_sip_stack * stack, unsigned int milliseconds) Line 200  C
LibLinphone_no_tunnel.dll!sal_iterate(Sal * sal) Line 745   C
LibLinphone_no_tunnel.dll!linphone_core_iterate(_LinphoneCore * lc) Line 2608   C
Linphone.Core.dll!Linphone::Core::LinphoneCore::IterateEnabled::set::__l12::<lambda>(Windows::Foundation::IAsyncAction ^ action) Line 1533  C++
Linphone.Core.dll!Platform::Details::__abi_FunctorCapture1<void <lambda>(Windows::Foundation::IAsyncAction ^),void,Windows::Foundation::IAsyncAction ^>::Invoke(Windows::Foundation::IAsyncAction ^ __arg0) Line 857    C++
[External Code] 
[Frames below may be incorrect and/or missing, no symbols loaded for THREADPOOLWINRT.DLL]

I tried on emulators and also on real device (Lumia 640 XL WP8.1 Update 2) and I get the same error.

The log on the phone does not contain any error message.

If I enter, let say wrong password, a "bad credentials" message is received. The crash happen only after success registration on SIP server.

Please help me to fix this issue. Any advice is welcome.

asked on Stack Overflow Aug 21, 2015 by iprida

1 Answer


After some long debugging I found the cause of the issue. The issue is related to the push notification functionality that is configured in


// Initialize the push channel 

// Initialize the task to listen to incoming call notifications on the push channel 

I don't use a push notification service, so I commented the code above and it solved the issue.

answered on Stack Overflow Mar 14, 2016 by iprida

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