Symptoms

K2 connect SmartObjects returned the following error after running for a long time:

Object has been disconnected or does not exist at the server
 

Diagnoses

1. Tried the solution from the following KB articles, but it is not working:
- http://help.k2.com/kb000552
- http://help.k2.com/kb001146

2. Added a breakpoint to their BAPI function using SAP external debugger, and noticed that the function is being executed twice. When the SmartObject is working, the function will only be executed once.
 

Resolution

Edit existing K2 connect service instance, and set useCache to True.