Ever hit a wall with that cryptic errordomain=nscocoaerrordomain&errormessage=не вдалося знайти вказану швидку команду.&errorcode=4 error on your Apple device? You’re not alone. This frustrating error can bring your development workflow to a screeching halt, but I’ve got you covered with practical solutions.
This error message – which roughly translates from Ukrainian as “failed to find the specified quick command” – typically appears when macOS or iOS can’t locate a file, shortcut, or alias an application needs. Let’s dig into what causes this NSCocoaErrorDomain error and how you can fix it for good.
Understanding the NSCocoaErrorDomain Error Message
When you encounter the errordomain=nscocoaerrordomain&errormessage=не вдалося знайти вказану швидку команду.&errorcode=4 error, you’re dealing with a specific Cocoa framework issue in Apple’s ecosystem. Breaking it down:
- NSCocoaErrorDomain: Indicates the error originates in Apple’s Cocoa framework
- Error message: “не вдалося знайти вказану швидку команду” (Ukrainian for “failed to find the specified quick command”)
- ErrorCode 4: Specifically refers to file not found (NSFileNoSuchFileError)
This error typically appears in console outputs like this:
Error Domain=NSCocoaErrorDomain Code=4 “не вдалося знайти вказану швидку команду.”
UserInfo={NSFilePath=/Users/username/Documents/project/missing_file.swift,
NSUnderlyingError=0x600003d9c880 {Error Domain=NSPOSIXErrorDomain Code=2 “No such file or directory”}}
The error message in Ukrainian might seem odd if your system language isn’t set to Ukrainian, but this can happen due to localization issues within specific applications or when working with files that originated from Ukrainian-localized systems.
Common Causes of NSCocoaErrorDomain Error Code 4
1. Missing or Relocated Files
The most straightforward cause of this error is when files aren’t where they should be. Here’s problematic code that might trigger this error:
swift
// Problematic code
let fileURL = URL(fileURLWithPath: “/Users/developer/Documents/Project/config.json”)
do {
let data = try Data(contentsOf: fileURL)
// Process data
} catch {
print(“Error: \(error)”)
}
Solution:
swift
// Fixed code with path verification
let fileURL = URL(fileURLWithPath: “/Users/developer/Documents/Project/config.json”)
let fileManager = FileManager.default
if fileManager.fileExists(atPath: fileURL.path) {
do {
let data = try Data(contentsOf: fileURL)
// Process data
} catch {
print(“Error loading existing file: \(error)”)
}
} else {
print(“File doesn’t exist at path: \(fileURL.path)”)
// Handle missing file appropriately
}
2. Insufficient File Permissions
Even if a file exists, permission issues can trigger the NSCocoaErrorDomain error:
swift
// Problematic code without permission checks
func writeToProtectedFile() {
let fileURL = URL(fileURLWithPath: “/Library/SystemConfiguration/config.plist”)
let data = “Hello World”.data(using: .utf8)!
try? data.write(to: fileURL)
}
Solution:
swift
// Fixed code with permission handling
func writeToProtectedFile() {
let fileURL = URL(fileURLWithPath: “/Library/SystemConfiguration/config.plist”)
let data = “Hello World”.data(using: .utf8)!
do {
try data.write(to: fileURL)
print(“Successfully wrote to file”)
} catch let error as NSError {
if error.domain == NSCocoaErrorDomain && error.code == 513 {
// Permission denied
print(“Permission denied. Try running with elevated privileges”)
} else {
print(“Unexpected error: \(error)”)
}
}
}
3. Broken Aliases or Symbolic Links
Working with aliases or symbolic links can lead to this error when links break:
swift
// Problematic code with potential broken alias
let aliasURL = URL(fileURLWithPath: “/Users/developer/Documents/shortcut.alias”)
try? FileManager.default.startDownloadingUbiquitousItem(at: aliasURL)
Solution:
swift
// Fixed code that resolves aliases
func resolveAliasFile(at url: URL) -> URL? {
let resourceValues = try? url.resourceValues(forKeys: [.isAliasFileKey])
if resourceValues?.isAliasFile == true {
return try? URL(resolvingAliasFileAt: url)
}
return url
}
let aliasURL = URL(fileURLWithPath: “/Users/developer/Documents/shortcut.alias”)
if let resolvedURL = resolveAliasFile(at: aliasURL) {
// Use resolved URL
print(“Resolved to: \(resolvedURL.path)”)
} else {
print(“Couldn’t resolve alias at \(aliasURL.path)”)
}
4. Network or External Storage Disconnection
When files reside on network drives or external storage, connection issues can cause this error:
swift
// Problematic code without checking drive availability
let networkDriveURL = URL(fileURLWithPath: “/Volumes/NetworkDrive/Project/data.db”)
let database = try? SQLiteDatabase(url: networkDriveURL)
Solution:
swift
// Fixed code that checks volume availability
func isVolumeAvailable(path: String) -> Bool {
let components = path.components(separatedBy: “/”)
if components.count > 2 && components[1] == “Volumes” {
let volumePath = “/” + components[1] + “/” + components[2]
return FileManager.default.fileExists(atPath: volumePath)
}
return true // Not on external volume
}
let networkDriveURL = URL(fileURLWithPath: “/Volumes/NetworkDrive/Project/data.db”)
if isVolumeAvailable(path: networkDriveURL.path) {
do {
let database = try SQLiteDatabase(url: networkDriveURL)
// Use database
} catch {
print(“Database error: \(error)”)
}
} else {
print(“Network drive not connected: /Volumes/NetworkDrive”)
// Handle reconnection or fallback
}
Troubleshooting NSCocoaErrorDomain Errors: A Diagnostic Approach
Step 1: Identify the Exact File Path
First, extract the problematic file path from the error message:
swift
func extractFilePath(from error: NSError) -> String? {
return error.userInfo[NSFilePathErrorKey] as? String
}
// Usage example
do {
try loadCriticalFile()
} catch let error as NSError {
if let filePath = extractFilePath(from: error) {
print(“Problem with file at: \(filePath)”)
}
}
Step 2: Verify File Existence and Permissions
Next, check if the file exists and has proper permissions:
swift
func diagnosePath(_ path: String) {
let fileManager = FileManager.default
// Check existence
if fileManager.fileExists(atPath: path) {
print(“✅ File exists”)
// Check permissions
if fileManager.isReadableFile(atPath: path) {
print(“✅ File is readable”)
} else {
print(“❌ File is not readable”)
}
if fileManager.isWritableFile(atPath: path) {
print(“✅ File is writable”)
} else {
print(“❌ File is not writable”)
}
// Get attributes for more info
if let attributes = try? fileManager.attributesOfItem(atPath: path) {
print(“📄 File type: \(attributes[.type] ?? “Unknown”)”)
print(“🔐 Permissions: \(attributes[.posixPermissions] ?? “Unknown”)”)
print(“👤 Owner: \(attributes[.ownerAccountName] ?? “Unknown”)”)
}
} else {
print(“❌ File does not exist”)
// Check parent directory existence
let directory = (path as NSString).deletingLastPathComponent
if fileManager.fileExists(atPath: directory) {
print(“✅ Parent directory exists”)
} else {
print(“❌ Parent directory doesn’t exist”)
}
}
}
Step 3: Check for File Corruption
For potentially corrupted files, implement verification methods:
swift
func verifyFileIntegrity(at path: String) -> Bool {
guard let data = try? Data(contentsOf: URL(fileURLWithPath: path)) else {
return false
}
// Simple size check
if data.count == 0 {
print(“File is empty, possibly corrupted”)
return false
}
// For text files, check if content is readable
if let _ = String(data: data, encoding: .utf8) {
print(“Text file appears to be intact”)
return true
} else {
print(“Text file appears to be corrupted”)
return false
}
// For other file types, implement appropriate checks
// This could include checksum verification, header validation, etc.
}
Step 4: Debug Logging
Implement comprehensive logging to trace file operations:
swift
class FileOperationLogger {
static let shared = FileOperationLogger()
private var logFile: URL
private init() {
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
logFile = documentsDirectory.appendingPathComponent(“file_operations.log”)
}
func log(_ message: String, file: String = #file, function: String = #function, line: Int = #line) {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = “yyyy-MM-dd HH:mm:ss.SSS”
let timestamp = dateFormatter.string(from: Date())
let logEntry = “[\(timestamp)] [\(file):\(line) \(function)] \(message)\n”
if let data = logEntry.data(using: .utf8) {
if FileManager.default.fileExists(atPath: logFile.path) {
if let fileHandle = try? FileHandle(forWritingTo: logFile) {
fileHandle.seekToEndOfFile()
fileHandle.write(data)
fileHandle.closeFile()
}
} else {
try? data.write(to: logFile)
}
}
print(logEntry, terminator: “”)
}
}
// Usage example
func loadFile(at path: String) {
FileOperationLogger.shared.log(“Attempting to load file at: \(path)”)
// Rest of file loading code
}
Implementing Robust Solutions
Comprehensive File Manager Implementation
Here’s a complete implementation of a robust file manager class that handles NSCocoaErrorDomain errors gracefully:
swift
class RobustFileManager {
static let shared = RobustFileManager()
private let fileManager = FileManager.default
enum FileError: Error {
case fileNotFound
case permissionDenied
case pathInvalid
case volumeUnavailable
case unknown(Error)
}
func readFile(at path: String) throws -> Data {
let url = URL(fileURLWithPath: path)
// Check if path is on external volume
if isExternalVolumePath(path) && !isVolumeAvailable(path: path) {
throw FileError.volumeUnavailable
}
// Verify file exists
guard fileManager.fileExists(atPath: path) else {
throw FileError.fileNotFound
}
// Check read permissions
guard fileManager.isReadableFile(atPath: path) else {
throw FileError.permissionDenied
}
// Attempt to read file
do {
return try Data(contentsOf: url)
} catch let error as NSError {
if error.domain == NSCocoaErrorDomain {
switch error.code {
case 4: // NSFileNoSuchFileError
throw FileError.fileNotFound
case 257: // NSFileReadNoPermissionError
throw FileError.permissionDenied
default:
throw FileError.unknown(error)
}
} else {
throw FileError.unknown(error)
}
}
}
func writeFile(data: Data, to path: String) throws {
let url = URL(fileURLWithPath: path)
// Check if path is on external volume
if isExternalVolumePath(path) && !isVolumeAvailable(path: path) {
throw FileError.volumeUnavailable
}
// Create parent directories if needed
let directory = (path as NSString).deletingLastPathComponent
if !fileManager.fileExists(atPath: directory) {
try fileManager.createDirectory(atPath: directory, withIntermediateDirectories: true)
}
// Attempt to write file
do {
try data.write(to: url)
} catch let error as NSError {
if error.domain == NSCocoaErrorDomain {
switch error.code {
case 4: // NSFileNoSuchFileError
throw FileError.pathInvalid
case 513: // NSFileWriteNoPermissionError
throw FileError.permissionDenied
default:
throw FileError.unknown(error)
}
} else {
throw FileError.unknown(error)
}
}
}
private func isExternalVolumePath(_ path: String) -> Bool {
let components = path.components(separatedBy: “/”)
return components.count > 2 && components[1] == “Volumes”
}
private func isVolumeAvailable(path: String) -> Bool {
let components = path.components(separatedBy: “/”)
if components.count > 2 && components[1] == “Volumes” {
let volumePath = “/” + components[1] + “/” + components[2]
return fileManager.fileExists(atPath: volumePath)
}
return true
}
func resolveAlias(at path: String) throws -> String {
let url = URL(fileURLWithPath: path)
guard fileManager.fileExists(atPath: path) else {
throw FileError.fileNotFound
}
do {
let resourceValues = try url.resourceValues(forKeys: [.isAliasFileKey])
if resourceValues.isAliasFile == true {
let resolvedURL = try URL(resolvingAliasFileAt: url)
return resolvedURL.path
} else {
return path
}
} catch {
throw FileError.unknown(error)
}
}
}
// Usage examples
do {
let data = try RobustFileManager.shared.readFile(at: “/path/to/file.txt”)
print(“Successfully read \(data.count) bytes”)
} catch RobustFileManager.FileError.fileNotFound {
print(“The file doesn’t exist”)
} catch RobustFileManager.FileError.permissionDenied {
print(“Permission denied – check file permissions”)
} catch RobustFileManager.FileError.volumeUnavailable {
print(“The external volume containing this file is not connected”)
} catch {
print(“Unexpected error: \(error)”)
}
Automated Test Suite for File Access Issues
Create a test suite to detect potential NSCocoaErrorDomain issues automatically:
Swift
class FileAccessTester {
static func runDiagnostics(for paths: [String]) -> [String: String] {
var results = [String: String]()
for path in paths {
let result = diagnosePath(path)
results[path] = result
}
return results
}
static func diagnosePath(_ path: String) -> String {
let fileManager = FileManager.default
var diagnosticMessages = [String]()
// Check file existence
if fileManager.fileExists(atPath: path) {
diagnosticMessages.append(“✅ File exists”)
// Check if it’s an alias
let url = URL(fileURLWithPath: path)
do {
let resourceValues = try url.resourceValues(forKeys: [.isAliasFileKey])
if resourceValues.isAliasFile == true {
diagnosticMessages.append(“ℹ️ File is an alias”)
do {
let resolvedURL = try URL(resolvingAliasFileAt: url)
diagnosticMessages.append(“✅ Alias resolves to: \(resolvedURL.path)”)
if !fileManager.fileExists(atPath: resolvedURL.path) {
diagnosticMessages.append(“❌ Target of alias doesn’t exist”)
}
} catch {
diagnosticMessages.append(“❌ Failed to resolve alias: \(error.localizedDescription)”)
}
}
} catch {
diagnosticMessages.append(“⚠️ Couldn’t determine if file is an alias”)
}
// Check permissions
if fileManager.isReadableFile(atPath: path) {
diagnosticMessages.append(“✅ File is readable”)
} else {
diagnosticMessages.append(“❌ File is not readable”)
}
if fileManager.isWritableFile(atPath: path) {
diagnosticMessages.append(“✅ File is writable”)
} else {
diagnosticMessages.append(“❌ File is not writable”)
}
// Get file attributes
if let attributes = try? fileManager.attributesOfItem(atPath: path) {
if let fileType = attributes[.type] as? String {
diagnosticMessages.append(“📄 File type: \(fileType)”)
}
if let permissions = attributes[.posixPermissions] as? NSNumber {
diagnosticMessages.append(“🔐 Permissions: \(String(format:”%o”, permissions.intValue))”)
}
if let owner = attributes[.ownerAccountName] as? String {
diagnosticMessages.append(“👤 Owner: \(owner)”)
}
if let size = attributes[.size] as? NSNumber {
diagnosticMessages.append(“📏 Size: \(size.intValue) bytes”)
}
} else {
diagnosticMessages.append(“⚠️ Couldn’t read file attributes”)
}
// Try to read the file
do {
let data = try Data(contentsOf: URL(fileURLWithPath: path))
diagnosticMessages.append(“✅ Successfully read \(data.count) bytes”)
} catch {
diagnosticMessages.append(“❌ Failed to read file: \(error.localizedDescription)”)
}
} else {
diagnosticMessages.append(“❌ File doesn’t exist”)
// Check parent directory
let directory = (path as NSString).deletingLastPathComponent
if fileManager.fileExists(atPath: directory) {
diagnosticMessages.append(“✅ Parent directory exists”)
} else {
diagnosticMessages.append(“❌ Parent directory doesn’t exist”)
}
// Check if path includes external volumes
let components = path.components(separatedBy: “/”)
if components.count > 2 && components[1] == “Volumes” {
let volumeName = components[2]
let volumePath = “/Volumes/\(volumeName)”
if fileManager.fileExists(atPath: volumePath) {
diagnosticMessages.append(“✅ External volume ‘\(volumeName)’ is mounted”)
} else {
diagnosticMessages.append(“❌ External volume ‘\(volumeName)’ is not mounted”)
}
}
}
return diagnosticMessages.joined(separator: “\n”)
}
}
// Usage example
let paths = [
“/Users/developer/Documents/project/config.json”,
“/Applications/Xcode.app”,
“/Volumes/ExternalDrive/backup.dmg”
]
let diagnostics = FileAccessTester.runDiagnostics(for: paths)
for (path, result) in diagnostics {
print(“Diagnostics for \(path):”)
print(result)
print(“—————————-“)
}
Prevention Techniques vs. Recovery Strategies
| Prevention Techniques | Recovery Strategies |
| Use FileManager.default.fileExists() before accessing files | Implement fallbacks to default configurations when files are missing |
| Resolve aliases and symbolic links before use | Create missing directories and files on-demand when appropriate |
| Store absolute and relative paths for critical files | Implement automatic file repair mechanisms for corrupted files |
| Check external volume availability before access | Cache frequently accessed data locally to prevent external dependency issues |
| Implement proper error handling with specific error types | Log detailed error information for easier troubleshooting |
Conclusion
The NSCocoaErrorDomain error with the Ukrainian error message “не вдалося знайти вказану швидку команду” and error code 4 boils down to a file access issue. You can effectively eliminate these errors by implementing proper file existence checks, handling permissions correctly, resolving aliases properly, and accounting for external storage connectivity.
The most critical takeaway: always verify a file’s existence and accessibility before attempting operations, and implement comprehensive error handling to gracefully recover when things go wrong.