CoplayDev/unity-mcp · error · DirectoryNotFoundException

Source directory not found: {dir.FullName}

Error message

Source directory not found: {dir.FullName}

What it means

Thrown by FileUtility.CopyDirectory when the sourceDir passed to it does not exist on disk (DirectoryInfo.Exists is false). It is a guard before any file enumeration or copying begins, so no partial copy occurs. The exception message echoes dir.FullName for diagnosis.

Source

Thrown at TestProjects/AssetStoreUploads/Packages/com.unity.asset-store-tools/Editor/Utility/FileUtility.cs:57

                convertedPath = convertedPath.Substring(Constants.RootProjectPath.Length);
            }
            else
            {
                if (allowSymlinks && SymlinkUtil.FindSymlinkFolderRelative(convertedPath, out var symlinkPath))
                    convertedPath = symlinkPath;
            }

            return convertedPath;
        }

        public static void CopyDirectory(string sourceDir, string destinationDir, bool recursive)
        {
            // Get information about the source directory
            var dir = new DirectoryInfo(sourceDir);

            // Check if the source directory exists
            if (!dir.Exists)
                throw new DirectoryNotFoundException($"Source directory not found: {dir.FullName}");

            // Cache directories before we start copying
            DirectoryInfo[] dirs = dir.GetDirectories();

            // Create the destination directory
            Directory.CreateDirectory(destinationDir);

            // Get the files in the source directory and copy to the destination directory
            foreach (FileInfo file in dir.GetFiles())
            {
                string targetFilePath = Path.Combine(destinationDir, file.Name);
                file.CopyTo(targetFilePath);
            }

            // If recursive and copying subdirectories, recursively call this method
            if (recursive)
            {
                foreach (DirectoryInfo subDir in dirs)

View on GitHub (pinned to c21bf496bc)

Solutions

1. Check Directory.Exists(sourceDir) before calling CopyDirectory and log the absolute path.
2. Ensure the directory-producing step runs (and succeeds) before the copy step.
3. Use Path.GetFullPath to resolve relative paths and verify against the expected location.
4. On network/removable drives, confirm the mount is present before copying.

Example fix

// before
FileUtility.CopyDirectory(stagingDir, destDir, recursive: true);
// after
if (!Directory.Exists(stagingDir)) throw new DirectoryNotFoundException(stagingDir);
FileUtility.CopyDirectory(stagingDir, destDir, recursive: true);

if (!Directory.Exists(sourceDir))
    throw new DirectoryNotFoundException(sourceDir);

static bool IsCopyableSource(string s) =>
    !string.IsNullOrWhiteSpace(s) && Directory.Exists(s);

try { FileUtility.CopyDirectory(src, dst, recursive: true); }
catch (DirectoryNotFoundException ex) { Debug.LogError(ex.Message); }

When it happens

Trigger: Calling CopyDirectory with a non-existent source path, a relative path resolved against the wrong working directory, or a path on a network mount that is unavailable. Also when a path contains typos, wrong drive letters, or trailing separators that change resolution.

Common situations: The build/upload pipeline computes a staging directory that was never created, a previous step cleaned temp dirs, or the path was hardcoded for a different machine. Common in CI where artifacts live in a different location than locally.

Related errors

• The following directories do not exist:
• Path does not correspond to a valid package
• No validation paths were set
• Package was not found
• Could not find external project's validation results

AI-assisted analysis of CoplayDev/unity-mcp@c21bf496bc (2026-08-13). Data as JSON: /api/errors/7455ce5c15d88ca4. Report an issue: GitHub.