Could not write lines to file (Error) Fix

✅ Solutions #

🔧 1. Move the project to a shorter path #

This is the quickest and most effective fix.

Move your project folder to a location with a shorter path, such as:

plaintextCopyEditC:\Projects\UltimatePOS\

Instead of:

plaintextCopyEditG:\Ultimate_Desktop_For_Ultimate_Pos\sourcecode\ultimate_desktop_flutter\ultimate_desktop_flutter\

Shorter paths will avoid hitting the 260-character limit.

🛠️ 2. Enable long path support in Windows #

If you’re on Windows 10 or later, you can enable long path support.

Steps: #

1. Open Registry Editor (regedit)
2. Navigate to: arduinoCopyEditHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem
3. Find or create a key called: LongPathsEnabled
4. Set its value to 1 (DWORD)
5. Restart your PC to apply the change

Note: Your system must use NTFS and be Windows 10 (version 1607 or later).

🧱 3. Use subst to map a drive to your project #

You can create a virtual drive letter that maps directly to your long project path:

Example: #

bashCopyEditsubst X: "G:\Ultimate_Desktop_For_Ultimate_Pos\sourcecode\ultimate_desktop_flutter\ultimate_desktop_flutter"
cd X:
flutter build windows

This reduces the effective path length without physically moving your files.

⚠️ 4. Macro redefinition warning #

You’re also getting this warning:

rustCopyEditwarning C4005: 'SYSTEM_SERVICES_EXPORTS': macro redefinition

This means the macro SYSTEM_SERVICES_EXPORTS is defined multiple times. Check your system_services.cpp and related header files to ensure you’re not defining it redundantly. You can use header guards or #ifndef to prevent redefinition:

cppCopyEdit#ifndef SYSTEM_SERVICES_EXPORTS
#define SYSTEM_SERVICES_EXPORTS
#endif

📌 Summary #

Let me know which solution you’d like help with and I’ll guide you step by step.