Facing the “Unable to complete version check” error in Final Fantasy XIV? Learn how to fix the FFXIV boot error version check failed issue with proven solutions.
If you’re trying to launch Final Fantasy XIV and encounter the error message, “Version check failed” or “Unable to complete version check,” you’re not alone. This issue has affected many players across both the Square Enix launcher and Steam versions of the game. The error typically prevents players from accessing the launcher, downloading updates, or logging into the game entirely.
What is the FFXIV Version Check Error?
The “version check failed” error typically occurs during the launcher phase before the game even begins to load. You might see an error such as:
- “Unable to complete version check. [30410][30607][20457][404]”
- “Unable to download patch files”
- “Version check failed”
This error essentially means the game’s launcher is failing to communicate with Square Enix’s patch servers. The issue can stem from problems with your local network, system configuration, third-party software interference, or corrupted game files.
While it may seem like a daunting problem, there are multiple solutions—many of which are straightforward and have worked consistently for players.
What Causes the FFXIV Version Check Failed Error?
Understanding the root cause of the FFXIV boot error version check failed is key to applying the right fix. The issue can arise from several underlying problems:
1. Network Configuration Issues
Your internet connection may be blocking access to Square Enix’s patch servers. This could be due to your ISP, a restrictive router configuration, DNS issues, or firewalls that prevent outbound requests.
2. Corrupted or Incomplete Game Configuration Files
One of the most common culprits is the FFXIV_BOOT.cfg file. If this file becomes corrupted or contains incorrect values, the launcher may continuously restart or fail to validate patch data.
3. Firewall and Antivirus Interference
Aggressive antivirus software or firewalls can block communication between the launcher and patching servers. This is especially common with third-party software that restricts background network processes.
4. DNS or IP Routing Problems
Sometimes, your geographical location or ISP routes may cause patch servers to be unreachable. In such cases, switching DNS or using a VPN can help resolve the issue.
How to Fix FFXIV Boot Error “Version Check Failed”
Fix 1: Manually Edit the Boot Configuration File
This is the most reliable fix and has worked for many users. The file in question is FFXIV_BOOT.cfg, located in your game documents directory. Editing this file can help bypass the broken patch verification process.
Steps:
- Navigate to the folder:
Documents\My Games\FINAL FANTASY XIV - A Realm Reborn\ - Locate the
FFXIV_BOOT.cfgfile. - Open it using Notepad or any text editor.
- Find the line that reads: nginxCopyEdit
BootVersionCheckMode 0 - Change the value from
0to1, so it reads: nginxCopyEditBootVersionCheckMode 1 - Save the file.
After making the change, restart your computer and launch the game again. Some users report that the file reverts back to its original value, so it’s advisable to double-check the change after rebooting.
You can also right-click the file, go to Properties, and mark it as Read-only to prevent it from being overwritten.
Fix 2: Use a Mobile Hotspot to Force Patch Updates
Some players have discovered that simply switching their internet connection helps force the patcher to reconnect correctly to Square Enix’s servers. Using a mobile hotspot is a temporary solution, but it can work well to get through the patch process.
How to do it:
- Enable your phone’s mobile hotspot feature.
- Connect your PC or laptop to the hotspot.
- Launch the FFXIV launcher and allow it to complete the version check or download updates.
- Once complete, switch back to your regular internet connection.
The mobile network uses different DNS and routing paths, which can avoid the same connection blocks found on your home network.
Fix 3: Use a VPN to Bypass Network Restrictions
If your ISP is blocking or throttling game traffic, using a VPN can often resolve these issues. A VPN changes your IP address and routes your traffic through servers in another location, often avoiding blocked or congested paths.
How to use a VPN:
- Download a trusted VPN service (CyberGhost, NordVPN, ProtonVPN, etc.).
- Connect to a server in your country or a nearby region.
- Open the FFXIV launcher and attempt to patch or login.
- Once the launcher finishes updating, you can disconnect the VPN.
This method is especially useful if the launcher seems to stall or retry repeatedly during version check.
Fix 4: Edit Other Configuration Values
In addition to BootVersionCheckMode, there are other values in the configuration file that can influence launcher behavior. Some users have fixed the error by changing the following line:
B4EulaAgreement 0
Change it to:
B4EulaAgreement 1
This setting marks the EULA agreement as accepted. In certain situations, the launcher may refuse to proceed with patching if it believes the user hasn’t accepted the EULA, even if you already have in-game.
Again, after making this change, it’s wise to mark the file as read-only to ensure the values persist.
Fix 5: Run the Launcher as Administrator
Lack of administrative privileges can block the FFXIV launcher from modifying its own files or connecting to the network.
Steps:
- Right-click the FFXIV launcher shortcut.
- Select Run as Administrator.
- If prompted, allow the application through Windows Firewall.
You should also make sure that your antivirus isn’t mistakenly flagging the launcher. Temporarily disabling your antivirus and firewall (for testing purposes only) can help determine if they’re part of the issue.
Fix 6: Flush DNS and Reset IP Settings
Clearing your DNS cache and resetting your network stack can resolve many connection-related issues.
Steps:
- Open Command Prompt as Administrator.
- Run the following commands:
ipconfig /flushdns netsh int ip reset netsh winsock reset - Restart your computer.
- Launch the FFXIV launcher again.
This clears out old routing and DNS data that may be interfering with game server access.
Fix 7: Verify Game Files in Steam (Steam Users Only)
If you’re playing FFXIV through Steam, it’s a good idea to verify that no game files are missing or corrupted.
Steps:
- Open Steam.
- Navigate to Library > Right-click on Final Fantasy XIV.
- Choose Properties > Installed Files tab.
- Click Verify integrity of game files.
This will scan and replace missing or corrupted files which may be causing the boot or patch process to fail.
Frequently Asked Questions
Is it safe to edit the FFXIV_BOOT.cfg file?
Yes. This file is a local configuration file. Editing it will not affect your game data, nor will it result in a ban.
Will using a VPN result in a ban?
No. Using a VPN to access patch servers or troubleshoot launcher issues is not against Square Enix’s terms of service. However, avoid using VPNs to bypass regional restrictions or pricing differences.
Why does this error happen after a patch?
After major updates or patches, the launcher performs a stricter version check. If any part of the process is interrupted—such as poor connection, blocked ports, or DNS issues—it may fail to complete the version verification.
Conclusion
The “version check failed” error in Final Fantasy XIV can be a stubborn issue, but it is fixable. Whether it’s a simple configuration tweak or a network adjustment, one of the methods outlined above should resolve your launcher problems. Always start with editing FFXIV_BOOT.cfg, then try alternate connections like a mobile hotspot or VPN if needed.
If you’ve tried all these solutions and the problem persists, it may be time to contact Square Enix support or reinstall the game entirely. Fortunately, most users can resolve the issue without going that far.
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