After upgrading from 1.8 to 2.0 using the Banshee PPA I got this error:


Encountered Fatal Error
Exception has been thrown by the target of an invocation

An unhandled exception was thrown: Could not read add-in description

  at Mono.Addins.Addin.get_Description () [0x00000] in <filename unknown>:0 
  at Mono.Addins.AddinSessionService.CheckHostAssembly (System.Reflection.Assembly asm) [0x00000] in <filename unknown>:0 
  at Mono.Addins.AddinSessionService.ActivateRoots () [0x00000] in <filename unknown>:0 
  at Mono.Addins.AddinSessionService.Initialize () [0x00000] in <filename unknown>:0 
  at Mono.Addins.AddinManager.Initialize (System.String configDir) [0x00000] in <filename unknown>:0 
  at Banshee.ServiceStack.ServiceManager.InitializeAddins () [0x00000] in <filename unknown>:0 
  at Banshee.ServiceStack.ServiceManager.DefaultInitialize () [0x00000] in <filename unknown>:0 
  at Banshee.ServiceStack.Application.Initialize () [0x00000] in <filename unknown>:0 
  at Banshee.Gui.GtkBaseClient.Initialize (Boolean registerCommonServices) [0x00000] in <filename unknown>:0 
  at Banshee.Gui.GtkBaseClient..ctor (Boolean initializeDefault, System.String defaultIconName) [0x00000] in <filename unknown>:0 
  at Banshee.Gui.GtkBaseClient..ctor () [0x00000] in <filename unknown>:0 
  at Nereid.Client..ctor () [0x00000] in <filename unknown>:0 
  at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
Exception has been thrown by the target of an invocation.

  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) [0x00000] in <filename unknown>:0 
  at System.Activator.CreateInstance (System.Type type, Boolean nonPublic) [0x00000] in <filename unknown>:0 
  at System.Activator.CreateInstance (System.Type type) [0x00000] in <filename unknown>:0 
  at Banshee.Gui.GtkBaseClient.Startup () [0x00000] in <filename unknown>:0 
  at Hyena.Gui.CleanRoomStartup.Startup (Hyena.Gui.StartupInvocationHandler startup) [0x00000] in <filename unknown>:0 

.NET Version: 2.0.50727.1433
OS Version: Unix 2.6.35.28

Assembly Version Information:

System.Xml (2.0.0.0)
Banshee.Core (2.0.0.0)
Hyena.Data.Sqlite (2.0.0.0)
System.Core (3.5.0.0)
gdk-sharp (2.12.0.0)
Mono.Addins (0.4.0.0)
atk-sharp (2.12.0.0)
Hyena.Gui (2.0.0.0)
gtk-sharp (2.12.0.0)
Banshee.ThickClient (2.0.0.0)
Nereid (2.0.0.0)
NDesk.DBus.Proxies (0.0.0.0)
Mono.Posix (2.0.0.0)
Hyena (2.0.0.0)
NDesk.DBus (1.0.0.0)
glib-sharp (2.12.0.0)
System (2.0.0.0)
Banshee.Services (2.0.0.0)
Banshee (2.0.0.0)
mscorlib (2.0.0.0)

Platform Information: Linux 2.6.35-28-generic x86_64 unknown GNU/Linux

Disribution Information:

[/etc/lsb-release]
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=10.10
DISTRIB_CODENAME=maverick
DISTRIB_DESCRIPTION="Ubuntu 10.10"

[/etc/debian_version]
squeeze/sid





After googling a little I have seen this issue in several forums. Also when I first added the repository it didn't allow me to upgrade saying "The following packages have been kept back" and banshee was listed, I had to upgrade using

sudo apt-get install banshee


Not sure if the app was kept back because of this migration error. Thanks for the hard work