What does Windows error code 123 (ERROR_INVALID_NAME) mean? Status / error code: Category: Constant name: Source: Operating System: Description: The filename, directory name, or volume label syntax is incorrect. Could be also: ConstantTypeOS EPFNOSUPPORTerrnoSolaris ENOPROTOOPTerrnoWindows INACCESSIBLE_BOOT_DEVICEBugCheck CodeWindows Looking for a different code? Search another status or error code.