Symptoms
After publishing K2 connect Service object/Smartobject changes, the following error occurs when executing Smartobject:
Method 'something.something.something' not found.
Diagnoses
Usually after a publishing of a Service Object, both the K2 Connect and K2 Blackpearl service will need to be restarted to recognized the changes to the service objects and methods.
Resolution
Restarting the K2 Connect and K2 Blackpearl services resolved the issue.