Some Minecraft users are seeing an error whenever they attempt to launch the client (the game) or the server (.jar). The error message that comes up is: “A JNI error has occurred, please check your installation and try again”. This problem is mostly reported to occur with version Minecraft version 21w19a and newer and it’s confirmed to appear on Windows 7, Windows 8.1, Windows 10, and Windows 11. As it turns out, there are multiple causes that might trigger this error when certain users attempt to launch Minecraft and almost each of them is related to the Java installation. Here’s a list of possible culprits that are most likely responsible for causing the “A JNI error has occurred, please check your installation and try again”: Install the latest Java JDK versionIn most documented cases, this particular error happens when you attempt to launch Minecraft or a Minecraft server on a PC that doesn’t have Java 16 or newer installed. Keep in mind that starting with Minecraft build 21w19, you will need to have Java’s 16 JDK version installed on your PC, otherwise, the game will not launch. To fix this issue, you will simply need to update your current Java JDK to the most recent version available using the official channels. If you’re looking for step by step instructions on how to do this, follow the guide below:
If the problem is still not resolved, move down to the next potential fix below. Remove the broken System Path variable for JavaIf the first method was not effective in your case, the next thing you should investigate is a potentially broken system variable used by Java. A broken variable can be the determining factor in ‘tricking’ your Minecraft launcher into believing that the Java JDK requirement for the game is not installed when it actually is. In this case, you can get the issue resolved by accessing the System Properties screen and modifying the Environment variables in a way that the Java PATH environment is removed. This fix has been confirmed to be effective for a lot of Minecraft users that we’re encountering the “A JNI error has occurred, please check your installation and try again” when attempting to launch the game from a dedicated launcher. Follow the instructions below for a step-by-step guide that will guide you through the process of removing the corrupted Java JDK path variable: Note: The instructions below should work on every recent Windows version including Windows 7, Windows 8.1, Windows 10, and Windows 11.
Kamil is a certified MCITP, CCNA (W), CCNA (S) and a former British Computer Society Member with over 9 years of experience Configuring, Deploying and Managing Switches, Firewalls and Domain Controllers also an old-school still active on FreeNode. How do I fix JNI error has occurred in Minecraft?Solution 1: Install the Latest Java Version
This a JNI error has occurred Minecraft server error occurs when you try to start Minecraft or a Minecraft server on a PC that does not have the latest version installed. To fix this, you just need to update your current Java to the latest version.
How do you resolve a JNI error has occurred Please check your installation and try again?To fix the error, you need to adjust the environment variables for Java. To do this, type “environment variable” in your Windows search and open the “Edit System Environment Variables” item. In this window you click on “Environment variables…”.
How do I fix JNI error in Java 1.18 server?The most common cause of the JNI error while trying to set up a Minecraft server is due to the Java version installed on the machine being outdated. Fortunately, it's easy enough to fix this issue via simply updating Java.
|