CoplayDev/unity-mcp · error · RuntimeError

Expected file not found: {f}

Error message

Expected file not found: {f}

What it means

Raised inside the temporary staging directory after copying MCPForUnity: one of four hardcoded files (SetupWindowService.cs, MCPForUnityMenu.cs, HttpEndpointUtility.cs, McpConnectionSection.cs) is missing from the staged copy. This is a structural-integrity guard — the release script applies string replacements to these files, so they must exist at the expected relative paths.

Source

Thrown at tools/prepare_unity_asset_store_release.py:139

        print("[dry-run] Would stage a temporary copy of MCPForUnity and apply Asset Store edits there.")
        print(
            f"[dry-run] Would replace:\n- {dest_mcp}\n  with\n- {source_mcp}")
        return 0

    # 1) Stage a temporary copy of MCPForUnity and apply Asset Store-specific edits there.
    with tempfile.TemporaryDirectory(prefix="mcpforunity_assetstore_") as tmpdir:
        staged_mcp = Path(tmpdir) / "MCPForUnity"
        shutil.copytree(source_mcp, staged_mcp)

        setup_service = staged_mcp / "Editor" / "Setup" / "SetupWindowService.cs"
        menu_file = staged_mcp / "Editor" / "MenuItems" / "MCPForUnityMenu.cs"
        http_util = staged_mcp / "Editor" / "Helpers" / "HttpEndpointUtility.cs"
        connection_section = staged_mcp / "Editor" / "Windows" / \
            "Components" / "Connection" / "McpConnectionSection.cs"

        for f in (setup_service, menu_file, http_util, connection_section):
            if not f.is_file():
                raise RuntimeError(f"Expected file not found: {f}")

        # Remove auto-popup setup window for Asset Store packaging
        remove_line_exact(setup_service, "[InitializeOnLoad]")

        # Set default remote base URL to the hosted endpoint
        replace_once(
            http_util,
            r'private const string DefaultRemoteBaseUrl = "";',
            f'private const string DefaultRemoteBaseUrl = "{remote_url}";',
        )

        # Default transport to HTTP Remote and persist inferred scope when missing
        replace_once(
            connection_section,
            r'transportDropdown\.Init\(TransportProtocol\.HTTPLocal\);',
            'transportDropdown.Init(TransportProtocol.HTTPRemote);',
        )
        replace_once(

View on GitHub (pinned to c21bf496bc)

Solutions

1. Check the error path in the message — it names the specific missing file.
2. Locate the file's current path in MCPForUnity/Editor/ and update the corresponding variable in the script (setup_service, menu_file, http_util, or connection_section).
3. If the file was removed entirely, determine whether the corresponding source edit is still needed and remove that edit step.

Example fix

# before
setup_service = staged_mcp / "Editor" / "Setup" / "SetupWindowService.cs"

# after — updated after the file moved during refactor
setup_service = staged_mcp / "Editor" / "Windows" / "Setup" / "SetupWindowService.cs"

from pathlib import Path

expected_files = [
    "Editor/Setup/SetupWindowService.cs",
    "Editor/MenuItems/MCPForUnityMenu.cs",
    "Editor/Helpers/HttpEndpointUtility.cs",
    "Editor/Windows/Components/Connection/McpConnectionSection.cs",
]
source_mcp = Path("MCPForUnity").resolve()
missing = [f for f in expected_files if not (source_mcp / f).is_file()]
if missing:
    raise SystemExit(f"Missing expected files in MCPForUnity: {missing}")

When it happens

Trigger: Any of the four files was renamed, moved, or deleted in a repo restructure. The script copies the live MCPForUnity tree, so the staged copy mirrors the current source layout. If Editor/Setup/SetupWindowService.cs, Editor/MenuItems/MCPForUnityMenu.cs, Editor/Helpers/HttpEndpointUtility.cs, or Editor/Windows/Components/Connection/McpConnectionSection.cs no longer sits at that exact path, the loop raises.

Common situations: A refactoring PR reorganized the Editor/ folder hierarchy; a file was split or merged; the script was written against an older layout than the current branch.

Related errors

• Source MCPForUnity folder not found: {source_mcp}
• Assets folder not found: {assets_dir}
• {path}: expected to remove exactly 1 line '{line}', removed
• Package file not found: {PACKAGE_JSON}
• --remote-url must be a non-empty URL

AI-assisted analysis of CoplayDev/unity-mcp@c21bf496bc (2026-08-13). Data as JSON: /api/errors/37a236b16deb0950. Report an issue: GitHub.