NB_ILLEGAL_BUFFER_LEN                        1
     NB_INVALID_COMMAND                           3
     NB_COMMAND_TIME_OUT                          5
     NB_MESSAGE_INCOMPLETE                        6
     NB_DATA_NOT_RECEIVED                         7
     NB_ILLEGAL_LOCAL_SESSION                     8
     NB_NO_RES_AVAILABLE                          9
     NB_SESSION_CLOSED                            10
     NB_COMMAND_CANCELLED                         11
     NB_DUPLICATE_NAME                            13
     NB_NAME_TABLE_FULL                           14
     NB_CMND_CMPL_DEREGISTERED                    15
     NB_SESSION_TABLE_FULL                        17
     NB_SES_OPEN_REJECTED                         18
     NB_ILLEGAL_NAME_NUMBER                       19
     NB_REMOTE_NAME_NOT_FOUND                     20
     NB_LOCAL_NAME_NOT_FOUND                      21
     NB_NAME_IN_USE                               22
     NB_NAME_DELETED                              23
     NB_SESSION_ENDED_ABNORMALLY                  24
     NB_NAME_CONFLICT                             25
     NB_INTERFACE_BUSY                            33
     NB_MAX_CMNDS_EXCEEDED                        34
     NB_INVALID_ADAPTER                           35
     NB_CMND_ALREADY_COMPLETED                    36
     NB_CMND_INVALID_TO_CANCEL                    38
     NB_NAME_DEFINED_BY_OTHERS                    48
     NB_ENVIRONMENT_NOT_DEFINED                   52
     NB_NO_OS_RESOURCES                           53
     NB_MAX_APPL_EXCEEDED                         54
     NB_NO_SAP_AVAILABLE                          55
     NB_INADEQUATE_RESOURCES                      56
     NB_INVALID_NCB_ADDRESS                       57
     NB_RESET_INVALID                             58
     NB_INVALID_DD_ID                             59
     NB_SEGMENT_LOCK_UNSUCCESSFUL                 60
     NB_DD_OPEN_ERROR                             63

     NB_OS_ERROR_DETECTED                         64
     NB_PERM_RING_STATUS                          79

     NB_UNEXPECTED_CCB_ERROR                      246
     NB_ADAPTER_OPEN_ERROR                        248
     NB_ADAPTER_HANDLER_ERROR                     249
     NB_ADAPTER_CHECK                             250
     NB_CODE_NOT_OPERATIONAL                      251
     NB_OPEN_FAILURES                             252
     NB_UNEXPECTED_CLOSE                          253
     NB_COMMAND_IN_PROCESS                        255