When I try to open forge i get the message The Java JAR file "forge-1.12-14.21.1.2387-universal.jar" could not be launched. It also doesnt work for my modpack launcher. I have looked at many threads and still cant figure out how to fix it. By the way I am on a mac
[p]I just tried that and got the error:[/p]
We appear to be missing one or more essential library files.[/p]
You will need to add them to your server before FML and Forge will run successfully.java.lang.ClassNotFoundException: net.minecraft.launchwrapper.Launch[/p]
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)[/p]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[/p]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)[/p]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[/p]
at java.lang.Class.forName0(Native Method)[/p]
at java.lang.Class.forName(Class.java:348)[/p]
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:44)[/p]
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:31)[/p]
[p]I tried and got the error[/p]
Error: Unable to access jarfile forge-1.12-14.21.1.2443-installer.jar[/p]
[p]Nevermind I forgot to actually try opening it normally it worked THANK YOU SO MUCH[/p]
When I try to open forge i get the message The Java JAR file "forge-1.12-14.21.1.2387-universal.jar" could not be launched. It also doesnt work for my modpack launcher. I have looked at many threads and still cant figure out how to fix it. By the way I am on a mac
Open a terminal, go to where "forge-1.12-14.21.1.2387-universal.jar" is located, type: "java -jar forge-1.12-14.21.1.2387-universal.jar" hit enter.
How about 'java -jar Desktop/forge-1.12-14.21.1.2387-universal.jar"? Provided that's where the jar is.
We appear to be missing one or more essential library files.[/p]
You will need to add them to your server before FML and Forge will run successfully.java.lang.ClassNotFoundException: net.minecraft.launchwrapper.Launch[/p]
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)[/p]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[/p]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)[/p]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[/p]
at java.lang.Class.forName0(Native Method)[/p]
at java.lang.Class.forName(Class.java:348)[/p]
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:44)[/p]
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:31)[/p]
Try the installer jar, http://files.minecraftforge.net/maven/net/minecraftforge/forge/index_1.12.html
Run the installer with "java -jar forge-1.12-14.21.1.2443-installer.jar -installServer"
Error: Unable to access jarfile forge-1.12-14.21.1.2443-installer.jar[/p] [p]Nevermind I forgot to actually try opening it normally it worked THANK YOU SO MUCH[/p]