VS2015 Pro Update 3

.NET 4.7.02558 installed

K2 for Visual Studio 4.0.4.6 installed

View Destination Code, there is a warning icon that Method DestinationRule_ExecuteCode could not be resolved.   (this type of error occurs for all the view codes of all types)

Right click on an empty space, select Generate Handle. 

Cannot create method in the associated activity 'DestinationRule_9c16fd.....".  Make sure a class with this activity name exists.

In the past it would generate Initialized/Completed stubs for me to put custom code in.