#1470 Error: A JNI error has occurred, please check your installation and try again

[Dimitris]

hi to all,
I'm getting this error when launching any squirrel version newer than 20210321_2133 (20210321_2133 version works)
My environment is win10 64bit with java version is 1.8.0_291
I've made a clean installation but the error persists

thank you in advance
jim

[Gerd Wagner]

I assume the entire error message is the one below. The problem is that snapshot-20210321_2133 was the last snapshot that ran with Java 8. (This snapshot preceded the 4.2.0 release which was the last release that ran on Java 8.)

Newer releases need Java 11 at least.

I'm wandering why before SQuirreL even began to start you didn't see a message dialog pointing to the Java version problem. Do you use your own startup script?

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: net/sourceforge/squirrel_sql/client/Main has been compiled by a more recent version of the Java Runtime (class file version 55.0), 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(ClassLoader.java:763)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)