| 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.
                                    					 
                                  |