Knowledge Base

How to fix Error: Unable to access jarfile server.jar

This error message in your Minecraft server console indicates that the server cannot locate the essential "server.jar" file. This file is the core of your Minecraft server, responsible for running the game. Here's how to troubleshoot and fix this issue:

1. Verify Server.jar Existence

• Check File Location: The "server.jar" file should be located within the main directory of your Minecraft server installation.

2. Reinstall Server

• Pterodactyl panel can download the necessary jar file into server; the easiest solution is to reinstall it. This will not delete anything to your server.
• Go to SETTINGS within your server's panel.
• Click on Reinstall.
• This will automatically download and install the correct "server.jar" file based on the server type you selected (e.g., Spigot, Vanilla).

3. Restart Server

• After any of the above steps, restart your Minecraft server. This will ensure the server recognizes the newly installed or corrected "server.jar" file.

Troubleshooting Tips

• Jar file still missing after reinstall. Check Versioning settings in the STARTUP tab. The version is only as good as the one from Minecraft. It must be precise and exact. If the version is incorrect, it won't  be found in the Minecraft download portal.
• When in doubt, put "latest" in the version
• Check Server Logs: Examine the server logs for any other error messages that might provide more clues about the issue.
• Incompatibilities: Make sure your own files, world, plugins, mods and settings coming from a different server matches the server type you intended to install (e.g., don't use a Spigot jar if your files are intended for a Vanilla server).