What does Windows error code 144 (ERROR_DIR_NOT_ROOT) mean? Status / error code: Category: Constant name: Source: Operating System: Description: The directory is not a subdirectory of the root directory. Could be also: ConstantTypeOS ETOOMANYREFSerrnoSolaris PP1_INITIALIZATION_FAILEDBugCheck CodeWindows Looking for a different code? Search another status or error code.