Solved start.bat now wont open

lilVloi · Apr 3, 2022

Hey i want to create minecraft server on my localhost and i installed latest minecraft version and i created start.bat, inside it this code

@echo off
java -Xms#G -Xmx#G -XX:+UseG1GC -jar server.jar --nogui
pause

and i try to open start.bat its not opening and not doing anything

its .bat disabled on Windows 11 and i need to enable it ?

Archigos · Apr 3, 2022

Batch files are NOT disabled in Windows 11... can you try opening a normal command prompt in the directory and manually run the .bat file to see if an error comes up?

lilVloi · Apr 3, 2022

Archigos said:
Batch files are NOT disabled in Windows 11... can you try opening a normal command prompt in the directory and manually run the .bat file to see if an error comes up?

Hi thanks for replying, i did what u told to try to open it using Command Promppt and it worked but now im running on a new issue it says

Invalid initial heap size: -Xms#G
Error: Could not create the Java Virtual Machine.
Error: A fetal exception has occurred. Program will exit.
Press any key to continue . . .

Archigos · Apr 3, 2022

Sadly, I don't know the syntax for running a Minecraft Server, but I thought you had to specify RAM, etc. which I didn't see in your switches.

Archigos · Apr 3, 2022

As a test, save this as start.bat and see what happens.

Batch:

@echo off
java -jar server.jar --nogui
pause

Archigos · Apr 3, 2022

I see the problem now... in the switches you're using, you have the change the # to a number
So:

Batch:

java -Xms#G -Xmx#G -XX:+UseG1GC -jar server.jar --nogui

would be:

Batch:

java -Xms1G -Xmx2G -jar server.jar --nogui

I couldn't find info on -XX:+UseG1GC

Info taken from here: Tutorials/Setting up a server

lilVloi · Apr 3, 2022

Archigos said:
I see the problem now... in the switches you're using, you have the change the # to a number
So:

Batch:

java -Xms#G -Xmx#G -XX:+UseG1GC -jar server.jar --nogui

would be:

Batch:

java -Xms1G -Xmx2G -jar server.jar --nogui

I couldn't find info on -XX:+UseG1GC

Info taken from here: Tutorials/Setting up a server

that also didn't work,

C:\Users\lilVloi\Desktop\localhostserver>java -Xms1G -Xmx2G -jar server.jar --nogui
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

C:\Users\lilVloi\Desktop\localhostserver> _

Archigos · Apr 3, 2022

By the looks, you're using an older version of JRE and need to install a newer one.

check

Batch:

java --version

lilVloi · Apr 3, 2022

Archigos said:
By the looks, you're using an older version of JRE and need to install a newer one.

check

Batch:

java --version

Oh i see now

Archigos · Apr 3, 2022

Also, don't forget to accept the EULA by changing the value from false to true in the required file before you attempt to start it if you haven't already.

lilVloi · Apr 3, 2022

Archigos said:
Also, don't forget to accept the EULA by changing the value from false to true in the required file before you attempt to start it if you haven't already.

yes i know about the EULA but how do i update java to be acceptable running a localhost server

lilVloi · Apr 3, 2022

lilVloi said:
yes i know about the EULA but how do i update java to be acceptable running a localhost server

is ther a way to do that using command prompt

Archigos · Apr 3, 2022

Go here: https://www.java.com/en/ and download the latest version

Archigos · Apr 3, 2022

There isn't an 'easy' way to accept the EULA via command prompt, just open the text file, change the info and save it.

Archigos · Apr 3, 2022

You can get the newest version of the Server from here: Minecraft Server Download with an example of the command to use in your batch file as well.

lilVloi · Apr 3, 2022

Archigos said:
Go here: https://www.java.com/en/ and download the latest version

but indeed i have downloaded this before do u mean JDK ? cuz i dont have JDK

and dont worry i know how to accept the EULA

Archigos · Apr 3, 2022

Honestly don't know since I've never tried it, but I 'think' you only need the JRE and not the JDK, but if you want, the JDK won't hurt you any (just take up a little more room on your drive) as the JDK integrates the JRE inside it.

lilVloi · Apr 3, 2022

Archigos said:
Honestly don't know since I've never tried it, but I 'think' you only need the JRE and not the JDK, but if you want, the JDK won't hurt you any (just take up a little more room on your drive) as the JDK integrates the JRE inside it.

Thank u so much i think the problem has been solved, i just need to update the java version ;3