Right-click the OneDrive cloud icon in your system tray, open Settings , go to the Backup tab, and select Manage Backup .
The executable cannot establish a local directory footprint without explicitly elevated rights.
Corrupt profile files often prevent new save data from being generated. 1. Grant Windows Security Permissions
Delete config.cfg from Documents\Activision\Prototype 2\ . The game will recreate it.
Modern Windows environments treat Program Files as a protected system directory. When the game attempts to write a save file (e.g., slot1.sav ) to a folder inside Program Files , the User Account Control (UAC) blocks the write operation. The game engine does not possess the exception handling to request elevated permissions; it simply detects the write failure and throws the generic "Failed to save data" error. prototype 2 failed to save data fix
Add prototype2.exe to the "Allowed apps" list in Windows Security.
Fixes were implemented in three tiers: immediate hotfixes, short-term robust changes, and long-term architectural improvements.
Other third-party antivirus programs (Avast, AVG, McAfee) might flag prototype2.exe and block it from writing to the disk. Open your antivirus software. Check the quarantine or blocked programs list. Add prototype2.exe to the . 6. Edit the Game Configuration (Advanced)
Open Steam, right-click Prototype 2 , hover over Manage , and select Browse local files . Right-click the OneDrive cloud icon in your system
app.post('/records', async (req, res) => const key = req.header('Idempotency-Key'); const client = await db.connect(); try await client.query('BEGIN'); const existing = await client.query('SELECT record_id FROM idempotency WHERE key = $1', [key]); if (existing.rowCount) const record = await client.query('SELECT * FROM records WHERE id = $1', [existing.rows[0].record_id]); await client.query('COMMIT'); return res.status(200).json(record.rows[0]);
To fix the , you must address modern Windows security permissions or limit your CPU core affinity. This annoying error usually pops up because modern Windows operating systems block the aging game from writing files to your Documents folder, or because your multi-core processor is overwhelming the game's old engine.
Sometimes, the game fails because it cannot create the required folder structure in your Documents directory. Navigate to your folder. Create a new folder named Prototype 2 . Inside that folder, create another folder named SaveData .
Fixing Prototype 2's data-loss issue required coordinated fixes across client, server, database, and infrastructure. Implementing idempotency, better error handling, timeouts alignment, and improved observability eliminated the failure mode and materially increased reliability. Applying these patterns proactively will reduce similar problems in future prototypes. Modern Windows environments treat Program Files as a
Click Allow an app through Controlled folder access , click Add an allowed app , browse your files, and select prototype2.exe . 3. Configure Third-Party Antivirus Exclusions
If you're seeing the "Failed to save data" message in Prototype 2 , you're likely dealing with a permissions conflict or a core-affinity issue common to older PC ports running on modern hardware. This error can prevent you from starting a new game or progress from being recorded. 1. Run as Administrator
Your security software might be blocking Prototype 2 from writing save data. This is a common but often overlooked cause.