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A Jni Error Has Occurred

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Some Minecraft users are seeing an error whenever they attempt to launch the client (the game) or the server (.jar). The fault message that comes upwards 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 information technology'due south confirmed to appear on Windows 7, Windows 8.1, Windows 10, and Windows xi.

JNI error has occurred in Minecraft

Equally it turns out, there are multiple causes that might trigger this fault when certain users effort to launch Minecraft and most each of them is related to the Java installation.

Here's a list of possible culprits that are nearly likely responsible for causing the "A JNI mistake has occurred, delight check your installation and endeavour once more":

  • Java 16 JDK is missing – If you lot get this error while attempting to launch Minecraft build 21w19 or newer, the offset affair you should do is cheque if the Coffee sixteen JDK installation is missing from your PC. This is the most pop reason why this error is encountered when launching Minecraft on PC. If the Java 16 JDK is missing from your reckoner installation, download and install it from the official channels.
  • Broken System Path for Java – As it turns out, some other reason why yous can expect to see this error is a scenario in which the system variable path for java is broken and tricks the Minecraft launcher into believing that Java is not installed on your PC when it actually is. If this scenario is applicable, you lot should exist able to fix the result past removing the cleaved organisation PATH variable from the Environment variables.

Install the latest Java JDK version

In most documented cases, this item error happens when you attempt to launch Minecraft or a Minecraft server on a PC that doesn't have Java 16 or newer installed. Go on in listen that starting with Minecraft build 21w19, you lot will need to have Java's sixteen JDK version installed on your PC, otherwise, the game will not launch.

To fix this result, yous will simply need to update your current Java JDK to the almost recent version available using the official channels.

If you're looking for step past step instructions on how to do this, follow the guide below:

  1. Ensure that the Minecraft launcher (Tlauncher or whatever other) is completely closed before moving to the next footstep below.
  2. Open up your default browser and visit the download folio of the Java xv Development kit.
  3. Once you're within, make sure the Windows tab is selected, then scroll all the way down to the Windows x64 Compressed archive and click on the associate Download hyperlink.
    Downloading the x65 compressed archive of the Java 16 JDK
  4. At the confirmation prompt, cheque the box associated with I reviewed and accept the Oracle Technology Network License Agreement for Oracle Java SE, then click on the Download button below.
  5. Wait until the download is complete, then unpack the null annal with WinZip, WinRar, 7Zip or the congenital-in equivalent and await for the operation to complete.
    Unzip the Java JDK
  6. In one case the extraction procedure is complete, navigate to the location where y'all extracted the JDK and re-create it on your clipboard by right-clicking on information technology and choosing Re-create from the context menu.
  7. Adjacent, employ File Explorer (My Computer) to navigate to the following location and paste the JDK 16 folder that y'all previously copied:
    C:\Program Files\Coffee
  8. Await until the copying operation is complete, and so close the window and double-click on your Minecraft launcher in one case over again (TLauncher or other).
  9. One time y'all're inside the launcher, click on the settings icon, and then click on Settings from the context bill of fare.
    Accessing the Settings carte du jour of the Minecraft launcher
  10. Inside the Settings menu, ensure that the Minecraft Settings is selected at the top, so click the Scan push associated with Java path.
  11. Side by side, use the browse window to navigate to the following location:
    C:\Program Files\Java\jdk-16.0.2\bin
  12. Once inside, make sure that javaw.exe is selected before clicking the Open button.
  13. Finally, click on the Save button to successfully save the java path in your Minecraft launcher.
  14. Launch the game normally and you should see the issue stock-still.

If the problem is still not resolved, move down to the side by side potential fix below.

Remove the cleaved Arrangement Path variable for Coffee

If the showtime method was not effective in your case, the adjacent thing you lot should investigate is a potentially broken system variable used past Java.

A broken variable tin can be the determining factor in 'tricking' your Minecraft launcher into assertive that the Java JDK requirement for the game is not installed when it actually is.

In this instance, yous can become the issue resolved by accessing the System Properties screen and modifying the Surroundings variables in a style that the Java PATH surround is removed.

This set up has been confirmed to be effective for a lot of Minecraft users that we're encountering the "A JNI mistake has occurred, please check your installation and endeavor again" when attempting to launch the game from a dedicated launcher.

Follow the instructions below for a step-by-step guide that volition guide you through the process of removing the corrupted Java JDK path variable:

Annotation: The instructions below should work on every recent Windows version including Windows 7, Windows eight.1, Windows 10, and Windows xi.

  1. Printing Windows central + R to open up up a Run dialog box. Adjacent, blazon 'sysdm.cpl' inside the text box and press Enter to open up up the System Properties window.
    Open upwardly the System Properties window

    Note: If you are prompted by the User Business relationship Control prompt, click Yep to grant admin access.

  2. In one case you're finally within the Organization Properties window, click on the Advanced tab, then click on Surroundings variables(nether Startup and Recovery).
    Open up Organization Variables menu
  3. Once you're inside the System Variables window, go to Organisation Variables, then choose Path and click on Edit.
    Editing the path variable
  4. Side by side, one time you're inside the Edit environment variable window, go ahead and await for an environment variable that mentions java.
  5. Once you spot the culprit, click on it in one case to select it, and then click Delete to get rid of it.
    Deleting the java surround variable
  6. Once the problematic environment variable has been deleted, reboot your PC, then start Minecraft again and meet if the "A JNI error has occurred, delight check your installation and try again" issue is at present stock-still.

Photo of Kamil Anwar

Kamil is a certified MCITP, CCNA (W), CCNA (S) and a quondam British Figurer Order Member with over 9 years of experience Configuring, Deploying and Managing Switches, Firewalls and Domain Controllers also an one-time-schoolhouse nevertheless active on FreeNode.

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