| 0 | Call is successful | 
 
			  
				| 1 | Call failed | 
 
			  
				| 2 | Duplicate client-id has been found (allocate) | 
 
			  
				| 3 | Possible causes:  
					 Client-id not found (save and restore).
					 Trying to save/restore/delete a record with no matching key.
					 Another internal error happens (due to incorrect CALL order).
					 Record allocation problem.
					  |