Failed to get audio device from Lync 2013 sdk

Question

When I try to get a list of available audio devices like this.

LyncClient client = LyncClient.GetClient(); foreach (Device dev in client.DeviceManager.AudioDevices) { //Do something } 

I get an error message Exception has been thrown by the target of an invocation.

 "Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Uc.IAudioDevice2'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{86B3E5FE-4635-4C1E- A725-C80B71D04984}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE))." 

Here is the stack trace

 at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) at Microsoft.Lync.Model.Internal.UCWCache.CreateUCW(Object source, CCOMInfo ccomInfo) at Microsoft.Lync.Model.Internal.UCWCache.GetITTargetNS(Object source) at Microsoft.Lync.Model.Internal.UCEnumerator`2.get_Current() at Microsoft.Lync.Model.Internal.UCEnumerator`2.System.Collections.Generic.IEnumerator<S>.get_Current() 

And the internal exception stack trace

 at Microsoft.Lync.Model.Device.AudioDevice.INTERNAL_Init(IAudioDevice initInterface) at Microsoft.Lync.Model.Device.AudioDevice.INTERNAL_Init_Object(Object initInterface) 

Answer 1

Have you verified that both Lync and your SDK have the same version numbers?

There seem to be many releases of Lync 2013, and they may not have the same version.

Answer 2

The problem seems to be in the "// Do something" part of the code.

I just ran after him.

  var Client = LyncClient.GetClient(); foreach (var dev in Client.DeviceManager.AudioDevices) { Console.WriteLine(dev.Name); } 

Is there any chance of a stack trace if this does not work?