{"record":{"id":"e39d6d16f876eeb3","repo":"OpenBB-finance/OpenBB","slug":"failed-to-load-the-file-specs-for-file-path","errorCode":null,"errorMessage":"Failed to load the file specs for '{file_path}'","messagePattern":"Failed to load the file specs for '(.+?)'","errorType":"exception","errorClass":"RuntimeError","httpStatus":null,"severity":"error","filePath":"openbb_platform/extensions/mcp_server/openbb_mcp_server/utils/app_import.py","lineNumber":33,"sourceCode":"\n    def _is_module_colon_notation(app_path: str) -> bool:\n        \"\"\"Check if the path uses module:name notation vs a Windows path.\"\"\"\n        if \":\" not in app_path:\n            return False\n        # Windows absolute path check (e.g., C:\\path or D:/path)\n        if len(app_path) >= 2 and app_path[1] == \":\" and app_path[0].isalpha():\n            # Could still have colon notation: C:\\path\\file.py:app\n            parts = app_path.split(\":\")\n            return len(parts) > 2  # More than just drive letter colon\n        return True\n\n    def _load_module_from_file_path(file_path: str):\n        \"\"\"Load a Python module from a file path.\"\"\"\n        spec_name = os.path.basename(file_path).split(\".\")[0]\n        spec = util.spec_from_file_location(spec_name, file_path)\n\n        if spec is None:\n            raise RuntimeError(f\"Failed to load the file specs for '{file_path}'\")\n\n        module = util.module_from_spec(spec)  # type: ignore\n        sys.modules[spec_name] = module  # type: ignore\n        spec.loader.exec_module(module)  # type: ignore\n        return module\n\n    # Case 1: Module path with colon notation (e.g., \"my_app.main:app\" or \"main:app\")\n    if _is_module_colon_notation(app_path):\n        module_path, name = app_path.rsplit(\":\", 1)\n        try:  # First try to import as a module\n            module = import_module(module_path)\n        except ImportError:  # If module import fails, try to load as a local file\n            if not module_path.endswith(\".py\"):\n                module_path += \".py\"\n\n            if not Path(module_path).is_absolute():\n                cwd = Path.cwd()\n                file_path = str(cwd.joinpath(module_path).resolve())","sourceCodeStart":15,"sourceCodeEnd":51,"githubUrl":"https://github.com/OpenBB-finance/OpenBB/blob/3e071fcc2cd9f891cac6040ae60296dba76dab46/openbb_platform/extensions/mcp_server/openbb_mcp_server/utils/app_import.py#L15-L51","documentation":"RuntimeError raised by the helper that imports a FastAPI app from a file path when importlib.util.spec_from_file_location returns None. That happens when the path does not point to a loadable Python source file (wrong extension, directory, or unreadable/nonexistent file), so no import spec can be constructed.","triggerScenarios":"Calling the CLI/import helper with --app pointing at a directory, a .txt/.json file, or a path with no read permission; spec_from_file_location only recognizes real .py source (or importable extensions), so anything else yields None.","commonSituations":"Passing a package directory instead of its entry module (./my_app instead of ./my_app/main.py), typos in the file extension, running from a different working directory with a relative path that resolves to nothing, files on mounts that report stale metadata.","solutions":["Point --app at an actual Python file ending in .py, e.g. --app ./my_app/main.py","If you meant a package, use module notation with a colon: --app my_app.main:app","Verify the path exists and is readable: os.path.isfile(path) before invoking the server"],"exampleFix":"# before\nopenbb-mcp --app ./my_app\n\n# after\nopenbb-mcp --app ./my_app/main.py --name app","handlingStrategy":"type-guard","validationCode":"from pathlib import Path\n\np = Path(app_path)\nif not p.is_file() or p.suffix != \".py\":\n    raise ValueError(f\"--app must point to a .py file, got: {app_path}\")","typeGuard":"def is_loadable_py_file(path: str) -> bool:\n    p = Path(path)\n    return p.is_file() and p.suffix == \".py\" and os.access(p, os.R_OK)","tryCatchPattern":"try:\n    app = import_app(\"./main.py\", \"app\")\nexcept RuntimeError as e:\n    if \"Failed to load the file specs\" in str(e):\n        raise SystemExit(\n            f\"'{app_path}' is not a loadable .py file — check extension and path\"\n        ) from e\n    raise","preventionTips":["Validate the --app path is an existing .py file before startup","Use colon notation (pkg.module:app) for packages instead of paths","Log the resolved absolute path at startup to catch wrong-cwd mistakes early"],"tags":["python","importlib","cli","file-path","fastapi"],"backgroundTag":null,"analyzedSha":"3e071fcc2cd9f891cac6040ae60296dba76dab46","analyzedAt":"2026-08-14T23:40:48.960Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}