Codici d'errore ritornati da IoErr().
ERROR_NO_FREE_STORE               103
ERROR_TASK_TABLE_FULL             105
ERROR_BAD_TEMPLATE                114
ERROR_BAD_NUMBER                  115
ERROR_REQUIRED_ARG_MISSING        116
ERROR_KEY_NEEDS_ARG               117
ERROR_TOO_MANY_ARGS               118
ERROR_UNMATCHED_QUOTES            119
ERROR_LINE_TOO_LONG               120
ERROR_FILE_NOT_OBJECT             121
ERROR_INVALID_RESIDENT_LIBRARY    122
ERROR_NO_DEFAULT_DIR              201
ERROR_OBJECT_IN_USE               202
ERROR_OBJECT_EXISTS               203
ERROR_DIR_NOT_FOUND               204
ERROR_OBJECT_NOT_FOUND            205
ERROR_BAD_STREAM_NAME             206
ERROR_OBJECT_TOO_LARGE            207
ERROR_ACTION_NOT_KNOWN            209
ERROR_INVALID_COMPONENT_NAME      210
ERROR_INVALID_LOCK                211
ERROR_OBJECT_WRONG_TYPE           212
ERROR_DISK_NOT_VALIDATED          213
ERROR_DISK_WRITE_PROTECTED        214
ERROR_RENAME_ACROSS_DEVICES       215
ERROR_DIRECTORY_NOT_EMPTY         216
ERROR_TOO_MANY_LEVELS             217
ERROR_DEVICE_NOT_MOUNTED          218
ERROR_SEEK_ERROR                  219
ERROR_COMMENT_TOO_BIG             220
ERROR_DISK_FULL                   221
ERROR_DELETE_PROTECTED            222
ERROR_WRITE_PROTECTED             223
ERROR_READ_PROTECTED              224
ERROR_NOT_A_DOS_DISK              225
ERROR_NO_DISK                     226
ERROR_NO_MORE_ENTRIES             232
ERROR_IS_SOFT_LINK                233
ERROR_OBJECT_LINKED               234
ERROR_BAD_HUNK                    235
ERROR_NOT_IMPLEMENTED             236
ERROR_RECORD_NOT_LOCKED           240
ERROR_LOCK_COLLISION              241
ERROR_LOCK_TIMEOUT                242
ERROR_UNLOCK_ERROR                243