Unable to load one or more of the requested types

1

2019-04-24 15:22:20.210 FATAL NServiceBus.GenericHost Exception when starting endpoint.
System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)
at System.Reflection.Assembly.GetTypes()
at System.Linq.Enumerable.d__172.MoveNext() at System.Linq.Enumerable.WhereEnumerableIterator1.MoveNext()
at System.Collections.Generic.List1..ctor(IEnumerable1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source) at NServiceBus.Hosting.Profiles.ProfileManager.ActivateProfileHandlers(EndpointConfiguration config) in C:\BuildAgent\work\3fdd02ec65f005b\src\NServiceBus.Hosting.Windows\Profiles\ProfileManager.cs:line 104 at NServiceBus.GenericHost.PerformConfiguration(Action1 moreConfiguration) in C:\BuildAgent\work\3fdd02ec65f005b\src\NServiceBus.Hosting.Windows\GenericHost.cs:line 82
at NServiceBus.GenericHost.d__1.MoveNext() in C:\BuildAgent\work\3fdd02ec65f005b\src\NServiceBus.Hosting.Windows\GenericHost.cs:line 0

2

Hi, the stacktrace that you posted includes the following

Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

Did you take a look at this property?

3

Yes. NServiceBus.Hosting.Helpers.AssemblyScanner Could not enumerate all types for ‘PurchaseOrderSubscriber, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null’. The same package was able to scan in Nservicebus v5

4

You mentioned v5. Have you changed the major version of NServiceBus lately? If yes, have you recompiled PurchaseOrderSubscriber (of course if it depends on NServiceBus library).