Linphone DLL not found when running iOS sample app

[anders9ustafsson]

Have built and deployed LinphoneXamarin.iOS sample app in Debug mode on my iPhone. When running the app, I get the following exception:

Unhandled Exception: System.DllNotFoundException: linphone Error while resolving expression: Object reference not set to an instance of an object.

[External Code]
0xFFFFFFFFFFFFFFFF in Linphone.LinphoneObject.fromNativePtr at XXX\LinphoneXamarin\LinphoneXamarin\LinphoneXamarin\LinphoneWrapper.cs C# 0x9 in Linphone.Factory.get_Instance at XXX\LinphoneXamarin\LinphoneXamarin\LinphoneXamarin\LinphoneWrapper.cs:12439,5 C# 0x19 in LinphoneXamarin.App..ctor at XXX\LinphoneXamarin\LinphoneXamarin\LinphoneXamarin\App.xaml.cs:25,13 C# 0x9 in LinphoneXamarin.AppDelegate.FinishedLaunching at XXX\LinphoneXamarin\LinphoneXamarin\LinphoneXamarin.iOS\AppDelegate.cs:26,4 C# 0x8 in LinphoneXamarin.IApplication.Main at XXX\LinphoneXamarin\LinphoneXamarin\LinphoneXamarin.iOS\Main.cs:17,4 C#

[anders9ustafsson]

I have tried to run the simulator instead, in both Debug and Release modes, but I still experience the same missing DLL exception.

[anders9ustafsson]

Issue is present both when building/deploying from Visual Studio on Windows and Mac.

[anders9ustafsson]

Found the error!

In the LinphoneWrapper class, the following string constants are defined:

#if WINDOWS_UWP
  public const string BELLE_SIP_LIB_NAME = "bellesip";
  public const string BCTOOLBOX_LIB_NAME = "bctoolbox";
#else
  public const string BELLE_SIP_LIB_NAME = "linphone";
  public const string BCTOOLBOX_LIB_NAME = "linphone";
#endif

However, for iOS, these library names should be linphone.framework/linphone, which is apparent from this definition in the same class:

#if __IOS__
  public const string LIB_NAME = "linphone.framework/linphone";
#else
  public const string LIB_NAME = "linphone";
#endif

As far as I can tell, the simplest approach is therefore to redefine BELLE_SIP_LIB_NAME and BCTOOLBOX_LIB_NAME for Android and iPhone as such:

#else
  public const string BELLE_SIP_LIB_NAME = LIB_NAME;
  public const string BCTOOLBOX_LIB_NAME = LIB_NAME;
#endif

[anders9ustafsson]

As far as I can tell, this issue has been fixed in a recent commit of linphone-xamarin, so I am closing it now.

[Adeel984]

@anders9ustafsson Sir i'm having same issue in Xamarin.Androind building on Windows. Any help please?

[JoeHenderson1962]

I'm getting that same error but it looks like it's because IOS isn't defined.