Wrong Java Version

[Maggi68]

Hello, after installation Wollmux at LibreOffice 5.7.2 I got the message;
[jni_uno bridge error] UNO calling Java method writeRegistryInfo: non-UNO exception occurred: java.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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
java stack trace:
java.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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(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 java.lang.ClassLoader.loadClass(Unknown Source)
at java.net.FactoryURLClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.sun.star.comp.loader.RegistrationClassFinder.find(RegistrationClassFinder.java:53)
at com.sun.star.comp.loader.JavaLoader.writeRegistryInfo(JavaLoader.java:376)
Wolmux is installed but there no Text and Icons at the navigator visible. How can I solv this easy, iam not a coder.....
Thanks

[smehrbrodt]

You have too old java in LibreOffice.
Which Wollmux version do you have?
And why the old LibreOffice 5.7.2?

[Maggi68]

Sorry, mistake..... I use 7.5.2 the actual version of LibreOffice and the actual Wolmux 18.2.10.
at extra extension is the Wolmux not activ, If I click to activate a window will shown:
[jni_uno bridge error] UNO calling Java method writeRegistryInfo: non-UNO exception occurred: java.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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
java stack trace:
java.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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(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 java.lang.ClassLoader.loadClass(Unknown Source)
at java.net.FactoryURLClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.sun.star.comp.loader.RegistrationClassFinder.find(RegistrationClassFinder.java:53)
at com.sun.star.comp.loader.JavaLoader.writeRegistryInfo(JavaLoader.java:376)
[jni_uno bridge error] UNO calling Java method writeRegistryInfo: non-UNO exception occurred: java.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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
java stack trace:
java.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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(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 java.lang.ClassLoader.loadClass(Unknown Source)
at java.net.FactoryURLClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.sun.star.comp.loader.RegistrationClassFinder.find(RegistrationClassFinder.java:53)
at com.sun.star.comp.loader.JavaLoader.writeRegistryInfo(JavaLoader.java:376)
(com.sun.star.uno.RuntimeException) { { Message = "[jni_uno bridge error] UNO calling Java method writeRegistryInfo: non-UNO exception occurred: java.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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\X000ajava stack trace:\X000ajava.lang.UnsupportedClassVersionError: de/muenchen/allg/itd51/wollmux/ComponentRegistration 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\X000d\X000a\X0009at java.lang.ClassLoader.defineClass1(Native Method)\X000d\X000a\X0009at java.lang.ClassLoader.defineClass(Unknown Source)\X000d\X000a\X0009at java.security.SecureClassLoader.defineClass(Unknown Source)\X000d\X000a\X0009at java.net.URLClassLoader.defineClass(Unknown Source)\X000d\X000a\X0009at java.net.URLClassLoader.access$100(Unknown Source)\X000d\X000a\X0009at java.net.URLClassLoader$1.run(Unknown Source)\X000d\X000a\X0009at java.net.URLClassLoader$1.run(Unknown Source)\X000d\X000a\X0009at java.security.AccessController.doPrivileged(Native Method)\X000d\X000a\X0009at java.net.URLClassLoader.findClass(Unknown Source)\X000d\X000a\X0009at java.lang.ClassLoader.loadClass(Unknown Source)\X000d\X000a\X0009at java.lang.ClassLoader.loadClass(Unknown Source)\X000d\X000a\X0009at java.net.FactoryURLClassLoader.loadClass(Unknown Source)\X000d\X000a\X0009at java.lang.ClassLoader.loadClass(Unknown Source)\X000d\X000a\X0009at com.sun.star.comp.loader.RegistrationClassFinder.find(RegistrationClassFinder.java:53)\X000d\X000a\X0009at com.sun.star.comp.loader.JavaLoader.writeRegistryInfo(JavaLoader.java:376)\X000d\X000a", Context = (com.sun.star.uno.XInterface) @0 } }

thanks

[smehrbrodt]

So which Java version do you have in LO?

[Maggi68]

Sorry what you mean in LO? Where can I see, what Java version is installed at LO?
Indepentent I installed Java runtime version 8 Update 341 (Build 1.8.0_341-b10) at the Windwos 10 PC for a other Software.
Maybe a conflict with a installed Java Version?
Thx

[smehrbrodt]

See https://wiki.documentfoundation.org/Documentation/HowTo/Install_the_correct_JRE_-_LibreOffice_on_Windows_10 for more information. Looks like Wollmux requires a newer JRE than you have currently configured.

[Maggi68]

Hello,
thanks for your explanation. But What I do now is, my installation of LO is x64 version, and I download like described at the link the Java x64 bit Version for Windows and deinstall at this installation procedure the old one. Now LO show me a hint to config the path to a Java installation after restart. I select the new Java installation like this:

When I try now to install wollmux again, window will shown with this information again.....

and after I click to activate the extension three windows (the first is this:

Thanks for your help

[smehrbrodt]

Maybe try a newer Java version, Java 11 at least.

[smehrbrodt]

There is a new WollMux / LOTS release out now, please try that one with a recent LibreOffice (7.4 or 7.5).