# JabRef 4.2 is not working under Opensuse Tumbleweed

**URL:** <https://discourse.jabref.org/t/jabref-4-2-is-not-working-under-opensuse-tumbleweed/1140>\
**Category:** Help\
**Created:** [May 3, 2018, 8:12am UTC](https://discourse.jabref.org/t/jabref-4-2-is-not-working-under-opensuse-tumbleweed/1140 "2018-05-03T08:12:09Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![rpoteau](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/rpoteau/32/404_2.png) [@rpoteau](https://discourse.jabref.org/u/rpoteau)\
**Post date:** [May 3, 2018, 8:12am UTC](https://discourse.jabref.org/t/jabref-4-2-is-not-working-under-opensuse-tumbleweed/1140/1 "2018-05-03T08:12:09Z")

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Hi,  
I am unable to make JabRef 4.2 work on my Linux distribution. No windows appear and it is frozen in the background. I am using Oracle java 1.8.0\_172, and when I launch JabRef from a console, I get the following messages:  
$Gtk-Message: 09:59:36.016: (for origin information, set GTK\_DEBUG): failed to retrieve property `gtk-primary-button-warps-slider' of type`gboolean’ from rc file value “((GString\*) 0x7f8d8440eb60)” of type `gboolean’  
09:59:40.087 [AWT-EventQueue-0] ERROR org.jabref.FallbackExceptionHandler - Uncaught exception occurred in Thread[AWT-EventQueue-0,6,main]  
java.lang.ClassCastException: java.awt.Font cannot be cast to javax.swing.plaf.FontUIResource  
at org.jabref.JabRefGUI.setLookAndFeel(JabRefGUI.java:288) ~[JabRef-4.2.jar:?]  
at org.jabref.JabRefGUI.openWindow(JabRefGUI.java:87) ~[JabRef-4.2.jar:?]  
at org.jabref.JabRefGUI.(JabRefGUI.java:60) ~[JabRef-4.2.jar:?]  
at org.jabref.JabRefMain.lambda$start$0(JabRefMain.java:182) ~[JabRef-4.2.jar:?]  
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) ~[?:1.8.0\_172]  
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) ~[?:1.8.0\_172]  
at java.awt.EventQueue.access$500(EventQueue.java:97) ~[?:1.8.0\_172]  
at java.awt.EventQueue$3.run(EventQueue.java:709) ~[?:1.8.0\_172]  
at java.awt.EventQueue$3.run(EventQueue.java:703) ~[?:1.8.0\_172]  
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0\_172]  
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) ~[?:1.8.0\_172]  
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) ~[?:1.8.0\_172]  
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205) [?:1.8.0\_172]  
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) [?:1.8.0\_172]  
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) [?:1.8.0\_172]  
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) [?:1.8.0\_172]  
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) [?:1.8.0\_172]  
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) [?:1.8.0\_172]

Any help or suggestion will be greatly appreciated  
Romuald  
PS. JabRef 4.1 is working fine with the same system

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**Author:** ![Siedlerchr](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/siedlerchr/32/216_2.png) [@Siedlerchr](https://discourse.jabref.org/u/Siedlerchr)\
**Post date:** [May 7, 2018, 11:47am UTC](https://discourse.jabref.org/t/jabref-4-2-is-not-working-under-opensuse-tumbleweed/1140/2 "2018-05-07T11:47:13Z")

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Hi,

this error happend when you used the option override font settings.  
This is fixed in the latest master version [http://builds.jabref.org/master/](http://builds.jabref.org/master/)

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**Author:** ![rpoteau](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/rpoteau/32/404_2.png) [@rpoteau](https://discourse.jabref.org/u/rpoteau)\
**Post date:** [May 7, 2018, 12:09pm UTC](https://discourse.jabref.org/t/jabref-4-2-is-not-working-under-opensuse-tumbleweed/1140/3 "2018-05-07T12:09:00Z")

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Hi  
indeed!  
Everything is fine now. Thank you for your answer and for the development of this very important tool, helpful in my day to day activity  
Regards  
Romuald

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<div class="post-metadata">

**Author:** ![Siedlerchr](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/siedlerchr/32/216_2.png) [@Siedlerchr](https://discourse.jabref.org/u/Siedlerchr)\
**Post date:** [May 7, 2018, 12:10pm UTC](https://discourse.jabref.org/t/jabref-4-2-is-not-working-under-opensuse-tumbleweed/1140/4 "2018-05-07T12:10:43Z")

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Thanks for your kind words!

We appreciate this a lot. And you can also contribute to the development of JabRef in many ways:  
[https://help.jabref.org/en/FAQcontributing](https://help.jabref.org/en/FAQcontributing)

Regards  
Christoph