Event [EventName] on interface type [InterfaceName] for instance ID [GUID] cannot be delivered. error in state machine workflow

 

Here’s a strange error when I try the state machine
workflow.

Event [EventName] on interface type [InterfaceName] for
instance ID [GUID] cannot be delivered.

 

So I find the solution here.

http://www.infoq.com/articles/HandleExternalEvent-in-Windows

 

2 ways to solve this：

1．  Set
the sender of the event null as it says in article

if (evh != null)
     evh(null,  args);

 

2． Mark
the local service [Serializable]

[Serializable]

class
PaymentProcessingService : IPaymentProcessingService{ … }

 

 

Happy workflow.