What Is The Unable To Access Jar File Error?

Last modified on Feb 14, 2022 in server errors

By ApexHosting

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Overview

Encountering the “Unable to access jarfile /jar/minecraft_server.jar” error occurs when the server panel is unable to locate the designated JAR File that has been set. This can occur if the file has an incorrect name or if the original file was deleted for any reason. This often occurs when attempting to set a custom server version on the panel using a custom JAR file. In order to fix this issue, renaming the JAR file or adjusting the server settings will be required to allow it to start properly. Rectifying this issue can be confusing for unfamiliar players, so we have created this Apex Hosting guide to ease you through the troubleshooting process.
 

Fixing Through FTP

1. Navigate to the Apex Server Panel, then stop the server.
2. Scroll down to the Game File section, then confirm the file name.
3. Proceed to the FTP File Access on the left, then log in.
4. Locate and enter the Jar folder.
5. Select and rename the .jar file to match the file name from earlier.
   
6. Submit the change once complete, then restart the server to try again.

 

Fixing With Server Settings

1. Navigate to the Apex Server Panel, then stop the server.
2. Proceed to the FTP File Access on the left-hand side.
3. Locate and enter the Jar folder.
4. Check the name of the jar file you wish to use.
5. Return to the main panel page, then scroll down to the Game File section.
   
6. Enter a new file name to match the FTP file, then save and reset.

 

Repairing Server Installation

If this issue occurs on a normal Minecraft version such as a modpack, it may be an issue with an update or if the file was deleted.

1. Navigate to the Apex Server Panel, then stop the server.
2. In the left-hand menu, locate and press the Reset Server Files button.
3. When prompted, check the Game File option.
   
4. Type in reset when prompted, then restart the server.

 
This will redownload the base files for the mod, including the jar file and any mods for the required version.
 

Conclusion

With that, you should now know how to adjust or repair the server settings in order to fix the “Unable to access jarfile” server error. This error may occur any time the used jar file is modified or deleted, so ensure that the above steps are taken in order to prevent the server from entering an error-loop. If you find that issues are still occuring after following the above troubleshooting solutions, feel free to visit our support page to receive additional help 24/7.