This can happen due to multiple reasons and will be specified in this guide.
The first step is to go to Scalacube.com and log in to your account.
Click on "Servers" and then "Manage server".
Click on "Manage" again.
The error can be seen in the server console after selecting your server and going to "Console".
Reasons
Reason 1: You uploaded a custom .jar and the server is not reading it. It can be that the .jar file itself is corrupted and might require re-uploading.Reason 2: The .jar file was not uploaded into the correct directory. Go back and make sure that it has been placed in the same folder the old .jar file was in.
Reason 3: Make sure the .jar file is renamed as to what the previous .jar file was. In this case the file should be named "server.jar".
After making sure that all these criterias are met and the .jar is still not operating correctly, you can contact our support for further information.
Congratulations! You now know How to Fix “Unable to Access Jarfile” on Minecraft
FAQ
Why do I see the "Unable to Access Jarfile" error on Minecraft?While it might seem like a bummer, you're not the only one. This error pops up when your Minecraft server has a hiccup accessing certain game files - those wily .jar files, to be precise.
What does a .jar file have to do with Minecraft?
Think of .jar files as the building blocks of your Minecraft game. If these blocks are not available, named wrongly, or found in the wrong places, well, Minecraft won't work properly. Thus, it gives you the 'Unable to Access Jarfile' error.
How do I know if my .jar file is corrupted?
Just like an egg, a corrupted .jar file can't do its job. If the server can't read your uploaded .jar file or is behaving weirdly, you might be dealing with a defective one. Re-uploading might be the way to go.
Why is the directory of the .jar file important?
Your .jar file needs to be in the right folder - think of it as its home. If it's not where it is supposed to be (the same folder where the old .jar file hung out), the server gets confused and hence, the error.
Can the name of the .jar file affect the game?
Oh yes, indeed! The .jar file should be named the same as the previous one. If you're dealing with this error, check if your .jar file is named "server.jar".
How can Scalacube help in fixing the jarfile error?
By logging into your Scalacube account, you'll be able to manage your Minecraft servers and hence, troubleshoot the 'Unable to Access Jarfile' error.
How do I find the error using Scalacube?
Once you are in the "Manage server" page, click "Manage" again. You'll find the error in the server console after selecting your server and going to "Console".
Is there any help available if I still can't fix the error?
Absolutely! After checking off all these points and if the .jar is still not behaving, don't sweat. Just contact Scalacube support. We'll be more than happy to assist you.
What happens once I fix the "Unable to Access Jarfile" error?
Congrats are in order! You can now return to your block-building spree without the annoying error message.
What's the quick rundown of the troubleshooting steps?
First, log into your Scalacube account. Next, pinpoint the reason for the error and follow the associated fix. If all else fails, Scalacube's support team is always ready to jump in and help.
Summary:
- Log into your Scalacube account
- Verify using the following points on why the error occurred
- Contact support for further information