Z7 Extension and LibreOffice 24.8.0.3 not recognized MacOS 14.6.1

jkr

LibreOffice and Z7 have been working fine (Mac OS 14.6.1 (23G93)). In Z7 7.0.4-beta.1+576e50552 I was asked to reinstall the extension. I wasn't able to get it to install correctly. In LO I get the message

https://s3.amazonaws.com/zotero.org/images/forums/u3959/ikxxr77qsejpr1mzf4ki.jpg

and in Zotero I get the msg

https://s3.amazonaws.com/zotero.org/images/forums/u3959/4oisg2lw9d2h3e2mq7ym.jpg

The link to the trouble shooting page states "This topic does not exist yet".

How can I reinstall the extension? It seems, that the old v6 extension is still in LO from the error message in LO (6.0.3).

When I click on "Enable" in the Extension dialog box in LO, I get the following error msg.

java.lang.ClassNotFoundException: org.zotero.integration.ooo.comp.RegistrationHandler

Debug ID: D369308833

Thanks for your help!

adomasven

See https://www.zotero.org/support/kb/word_processor_plugin_installation_error#libreoffice

EricBright

The exact same problem here! None of the proposed solutions seem to work. The following steps did _not_ work:

1. Deleting the extension folders in LibreOffice did not work:

`rd C:/Users/[user]/AppData/Roaming/libreoffice/4/cache/`
`rd C:/Users/[user]/AppData/Roaming/libreoffice/4/user/temp/`
`rd C:/Users/[user]/AppData/Roaming/libreoffice/4/user/extensions/`

2. Updating the Java JRE to the latest version dot not work (uninstalled all previous version, reinstalled a fresh, latest version).

3. Manual installation of the extension from `C:\Program Files\Zotero\integration\libreoffice` did not work (gave the error message).

Zotero: 7.0.4-beta.1+576e50552 (64-bit)
LibreOffice:
Version: 25.2.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: 2d591ae8ac55195762e155f93c39c046a4bcba82
CPU threads: 24; OS: Windows 11 X86_64 (10.0 build 22631); UI render: Skia/Raster; VCL: win
Locale: en-CA (en_US); UI: en-GB

EricBright

I believe the culprit is somehow the extension itself (v. 6.0.3). I happened to have an older version of the extension (v. 5.0.23) that installed just fine. It also worked alright after the installation.

adomasven

What is the version of JRE that is selected in LibreOffice Options -> Advanced dialog? What error are you getting when trying to manually install the extension?

jkr

I am using JRE 22.0,2

jkr

I get the following error msg when double-clicking on Zotero_OpenOffice_Integration.oxt file to install it:

java.lang.ClassNotFoundException: org.zotero.integration.ooo.comp.RegistrationHandler

adomasven

Sorry, there was a bug in the Zotero Beta LibreOffice plugin. We have now pushed an update with a fix.

EricBright

Thank you kindly for looking into the issue!

On my Windows 11, with Java 8 Update 421 (64-bit), the automatic installations fails. When I try to 'enable' the extension from within LibreOfficeDev, the following error message is emitted:

[jni_uno bridge error] UNO calling Java method writeRegistryInfo: non-UNO exception occurred: java.lang.UnsupportedClassVersionError: org/zotero/integration/ooo/comp/RegistrationHandler has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
java stack trace:
java.lang.UnsupportedClassVersionError: org/zotero/integration/ooo/comp/RegistrationHandler has been compiled by a more recent version of the Java Runtime (class file version 53.0), 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)

When the error message is dismissed, another one pops up:

(com.sun.star.uno.RuntimeException) { { Message = "[jni_uno bridge error] UNO calling Java method writeRegistryInfo: non-UNO exception occurred: java.lang.UnsupportedClassVersionError: org/zotero/integration/ooo/comp/RegistrationHandler has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0\X000ajava stack trace:\X000ajava.lang.UnsupportedClassVersionError: org/zotero/integration/ooo/comp/RegistrationHandler has been compiled by a more recent version of the Java Runtime (class file version 53.0), 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 } }

At the end, the extension remains disabled. Again, uninstalling the extension and reinstalling extension v. 5.0.23 fixes the issue.

The problem is that once Zotero is shut down and restarted, it automatically re-installs v. 7.0.1 of the LibreOffice extension over the working version, which, again, breaks the extension.

jkr

Thanks so much for pushing the new beta version. This has resolved the issue for me!

dstillman

@EricBright: Try the latest beta.

EricBright

Thank you very much @dstillman for the fix. v. 7.0.1 is now working as expected after the latest update. Kudos!

dstillman

Great, thanks very much to you and @jkr for reporting and helping us troubleshoot.