There are two types of Natural exit codes:
Startup errors, where exit codes 0 and 1 indicate success and all other exit codes indicate errors.
Errors generated by the TERMINATE statement, where
                                      exit codes 0 to 255 are possible.
                     
The following exit codes may occur when starting Natural.
| 2 | Terminal Control String (TCS) capability specified in
                                               SAGtermcap or Environment Variable
                                               NATTCHARSET.
                         |  
                                        
                     
| 3 | Failed to initialize character conversion table. | 
| 4 | Error in character conversion file NATCONV.INI. | 
| 5 | Unable to read database assignments from global configuration file NATCONF.CFG. | 
| 6 | Unable to find
                                               FNAT(dbid,fnr)
                                               or
                                               FUSER(dbid,fnr).
                                               Check your configuration files. 
                         |  
                                        
                     
| 7 | Cannot initialize LFILE table.
                         |  
                                        
                     
| 8 | Obsolete. | 
| 9 | Obsolete. | 
| 10 | Obsolete. | 
| 11 | Obsolete. | 
| 12 | Unable to read specified parameter file. Please verify the parameter file. | 
| 13 | Unable to read parameter file
                                               NATPARM.
                         |  
                                        
                     
| 14 | Storage manager initialization failed. | 
| 15 | End of file (EOF) encountered while reading from
                                               STDIN.
                         |  
                                        
                     
| 16 | Unable to open buffer pool; contact the Natural system administrator. | 
| 17 | Unable to read buffer pool assignments from NATURAL.INI file. | 
| 18 | Invalid FDIC assignment.
                         |  
                                        
                     
| 19 | Invalid FNAT assignment.
                         |  
                                        
                     
| 20 | Invalid FSEC assignment.
                         |  
                                        
                     
| 21 | Invalid FUSER assignment.
                         |  
                                        
                     
| 22 | Unable to load Natural login module. | 
| 23 | Unable to allocate memory for local data. Reduce
                                               USIZE and/or SSIZE
                                               parameter.
                         |  
                                        
                     
| 24 | Unable to load Natural display module. | 
| 25,26 | Error loading shareable image or DLL. | 
| 27 | Login cancelled. Natural terminates. | 
| 28 | Security violation during start of Natural. Natural terminates. | 
| 29 | Security violation during start of Natural. Login aborted due to too many login failures. | 
| 30 | Natural system error message raised. | 
| 31 | NAT0866 Your Natural nucleus is not a Natural Security nucleus. | 
| 32 | Password check failed. | 
| 33 | Lock manager cannot create/initialize semaphores. | 
| 34 | No library is accessible or present in specified
                                               FNAT/FUSER. Check system file assignments and file
                                               attributes of FNAT and FUSER (directories and files).
                                               
                         |  
                                        
                     
| 35 | Internal wfc i/o terminal driver error. | 
| 36 | Internal XVT error. | 
| 38 | Creation of runtime context failed. | 
| 39 | Unable to find NATDIR
                                               and/or NATVERS environment variable. If you have
                                               set the NATDIR environment variable, please check
                                               that it does not contain invalid or whitespace characters!
                                               NATVERS should only contain the Natural version.
                                               The path must contain a valid drive ID.
                         |  
                                        
                     
| 40 | Natural zmodem error. | 
| 41 | Creation of TF table failed because there are entries with different database types from older parameter module. Check parameter module with Natural Configuration Utility. | 
| 42 | Batch mode driver error. | 
| 43 | Screen window size is too small. | 
| 44 | Exit from SQL signal handler. | 
| 45 | Unable to load add-on product. | 
| 46 | Unable to access FNAT library
                                               SYSLIB. Insufficient privilege or file protection
                                               violation.
                         |  
                                        
                     
| 47 | Unable to read PARM_PATH entry from
                                               NATURAL.INI file or directory is not accessible.
                         |  
                                        
                     
| 48 | Unable to read CONFIG_NAME entry from
                                               NATURAL.INI file or file is not accessible. 
                         |  
                                        
                     
| 49 | Unable to read NATTCAP entry from
                                               NATURAL.INI file or file is not accessible.
                         | 
                                          
                                        
                     
| 50 | Unable to read NATCONV entry from
                                               NATURAL.INI file or file is not accessible.
                         |  
                                        
                     
| 51 |  Unable to process TMP_PATH entry from
                                               NATURAL.INI file. Path 'path'
                                               not accessible. 
                         |  
                                        
                     
| 52 | Unable to read PROFILE_PATH entry from
                                               NATURAL.INI file or directory is not accessible.
                         |  
                                        
                     
| 53 | Unable to open local configuration file NATURAL.INI. | 
| 54 | Unable to read NATCONF.CFG for
                                               NATOSDEP.
                         |  
                                        
                     
| 55 | Unable to read NATURAL.INI for
                                               NATEXTLIB.
                         |  
                                        
                     
| 57 | Not used. | 
| 59 | Unrecognized option 'option' specified. | 
| 60 | Not enough memory to initalize internal tables. | 
| 61 | Batch error occurred, but processing continued due to
                                               CC=ON parameter.
                         |  
                                        
                     
| 62 | More than one Natural session with active repository not allowed. | 
| 63 | Natural session with active repository already running. | 
| 64 | Failed to open FNAT's LIBDIR.SAG. Check presence and access protection. | 
| 65 | The FNAT assigned to this Natural session is out of date. | 
| 72 | This is an evaluation copy of Natural ... It is valid until... | 
| 73 | The test period of this evaluation copy of Natural ... has expired. It was valid until... | 
| 77 | Invalid FDDM assignment.
                         |  
                                        
                     
| 85 | Natural runtime startup error during context initialization. | 
| 86 | Invalid code page [
                                                  name ] specified.
                         |  
                                        
                     
| 87 | Failure initializing signal handlers. | 
| 88 | Conflicting buffer pool usage. | 
| 91 | No connection to Natural Web I/O Interface. | 
| 105 | Value of
                                               dynamic parameter ITERM must be ON or
                                               OFF.
                         |  
                                        
                     
| 106 | Terminate on error during initialization. |