Public bug reported:

When running scilab under openjdk-11 it fails to open the preferences windows 
with the following error (see bellow for the full output):
ERROR:  'Could not compile stylesheet'
FATAL ERROR:  'The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.'
           :The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.
Could not load file: 
/usr/share/scilab//modules/preferences/src/xslt/XConfiguration.xsl

$ cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.2 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.2 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/";
SUPPORT_URL="https://help.ubuntu.com/";
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/";
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy";
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic

$ apt policy scilab
scilab:
  Installed: 6.0.1-7ubuntu1~18.04
  Candidate: 6.0.1-7ubuntu1~18.04
  Version table:
 *** 6.0.1-7ubuntu1~18.04 500
        500 http://192.168.122.1:9999/ubuntu bionic-proposed/universe amd64 
Packages
        500 http://192.168.122.1:9999/ubuntu bionic-proposed/universe i386 
Packages
        100 /var/lib/dpkg/status
     6.0.1-1ubuntu1 500
        500 http://192.168.122.1:9999/ubuntu bionic/universe amd64 Packages
        500 http://192.168.122.1:9999/ubuntu bionic/universe i386 Packages
The IP and port are due to the proxy (approx) I am running to speed up installs.


How to reproduce:
1. open scilab in a terminal
2. go to Edit -> Preferences (or click the Preferences icon in the toolbar)
3. notice that the Preferences window does not show up and that the 
console/terminal will output an exception

Expected result:
Preferences window should show up.


Full output from scilab:
$ scilab
Picked up _JAVA_OPTIONS: 
-Djava.class.path=/usr/share/java/flexdock.jar:/usr/share/java/skinlf.jar:/usr/share/java/looks.jar:/usr/share/java/commons-logging.jar:/usr/share/java/jhall.jar:/usr/share/java/lucene-core-4.10.4.jar:/usr/share/java/lucene-analyzers-common-4.10.4.jar:/usr/share/java/lucene-queryparser-4.10.4.jar:/usr/share/maven-repo/org/freehep/freehep-util/debian/freehep-util-debian.jar:/usr/share/maven-repo/org/freehep/freehep-io/debian/freehep-io-debian.jar:/usr/share/maven-repo/org/freehep/freehep-graphicsio/debian/freehep-graphicsio-debian.jar:/usr/share/java/freehep-graphicsio-emf-2.1.jar:/usr/share/java/freehep-graphics2d-2.1.1.jar:/usr/share/java/jrosetta-API.jar:/usr/share/java/jrosetta-engine-1.0.4.jar:/usr/share/java/jgraphx.jar:/usr/share/java/jogl2.jar:/usr/share/java/gluegen2-rt.jar:/usr/share/java/jeuclid-core.jar:/usr/share/java/jlatexmath-fop-1.0.7.jar:/usr/share/java/fop.jar:/usr/share/java/saxon.jar:/usr/share/java/batik.jar:/usr/share/java/xml-apis-ext.jar:/usr/share/java/commons-io.jar:/usr/share/java/xmlgraphics-commons.jar:/usr/share/java/avalon-framework.jar:/usr/share/java/jlatexmath-1.0.7.jar:/usr/share/java/ecj.jar:/usr/share/java/javax.activation.jar:/usr/share/java/jaxb-runtime.jar:/usr/share/scilab/modules/console/jar/org.scilab.modules.console.jar:/usr/share/scilab/modules/localization/jar/org.scilab.modules.localization.jar:/usr/share/scilab/modules/core/jar/org.scilab.modules.core.jar:/usr/share/scilab/modules/ui_data/jar/org.scilab.modules.ui_data.jar:/usr/share/scilab/modules/preferences/jar/org.scilab.modules.preferences.jar:/usr/share/scilab/modules/scirenderer/jar/scirenderer.jar:/usr/share/scilab/modules/scinotes/jar/org.scilab.modules.scinotes.jar:/usr/share/scilab/modules/external_objects_java/jar/org.scilab.modules.external_objects_java.jar:/usr/share/scilab/modules/types/jar/org.scilab.modules.types.jar:/usr/share/scilab/modules/gui/jar/org.scilab.modules.gui.jar:/usr/share/scilab/modules/renderer/jar/org.scilab.modules.renderer.jar:/usr/share/scilab/modules/history_manager/jar/org.scilab.modules.history_manager.jar:/usr/share/scilab/modules/graphic_export/jar/org.scilab.modules.graphic_export.jar:/usr/share/scilab/modules/graphic_objects/jar/org.scilab.modules.graphic_objects.jar:/usr/share/scilab/modules/javasci/jar/org.scilab.modules.javasci.jar:/usr/share/scilab/modules/history_browser/jar/org.scilab.modules.history_browser.jar:/usr/share/scilab/modules/jvm/jar/org.scilab.modules.jvm.jar:/usr/share/scilab/modules/xcos/jar/org.scilab.modules.xcos.jar:/usr/share/scilab/modules/graph/jar/org.scilab.modules.graph.jar:/usr/share/scilab/modules/action_binding/jar/org.scilab.modules.action_binding.jar:/usr/share/scilab/modules/completion/jar/org.scilab.modules.completion.jar:/usr/share/scilab/modules/helptools/jar/scilab_images.jar:/usr/share/scilab/modules/helptools/jar/scilab_ru_RU_help.jar:/usr/share/scilab/modules/helptools/jar/scilab_en_US_help.jar:/usr/share/scilab/modules/helptools/jar/org.scilab.modules.helptools.jar:/usr/share/scilab/modules/commons/jar/org.scilab.modules.commons.jar:
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.scilab.modules.jvm.LibraryPath 
(file:/usr/share/scilab/modules/jvm/jar/org.scilab.modules.jvm.jar) to field 
java.lang.ClassLoader.sys_paths
WARNING: Please consider reporting this to the maintainers of 
org.scilab.modules.jvm.LibraryPath
WARNING: Use --illegal-access=warn to enable warnings of further illegal 
reflective access operations
WARNING: All illegal access operations will be denied in a future release
libEGL warning: DRI2: failed to authenticate
commons module not found.
graphic_objects module not found.
ui_data module not found.
graph module not found.
history_browser module not found.
slint module not found.
coverage module not found.
ERROR:  'Could not compile stylesheet'
FATAL ERROR:  'The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.'
           :The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.
Could not load file: 
/usr/share/scilab//modules/preferences/src/xslt/XConfiguration.xsl
java.lang.reflect.InvocationTargetException
 at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
 at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.base/java.lang.reflect.Method.invoke(Method.java:566)
 at org.scilab.modules.gui.events.callback.JavaCallBack$2.callBack(Unknown 
Source)
 at 
org.scilab.modules.gui.events.callback.CommonCallBack.actionPerformed(Unknown 
Source)
 at 
java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
 at 
java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
 at 
java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
 at 
java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
 at 
java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279)
 at 
java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
 at java.desktop/java.awt.Component.processMouseEvent(Component.java:6632)
 at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342)
 at java.desktop/java.awt.Component.processEvent(Component.java:6397)
 at java.desktop/java.awt.Container.processEvent(Container.java:2263)
 at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5008)
 at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
 at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
 at 
java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
 at 
java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
 at 
java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
 at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
 at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2772)
 at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
 at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
 at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
 at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
 at java.base/java.security.AccessController.doPrivileged(Native Method)
 at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
 at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
 at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
 at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
 at java.base/java.security.AccessController.doPrivileged(Native Method)
 at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
 at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
 at 
java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
 at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
 at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
 at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
 at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
 at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.NullPointerException
 at org.scilab.modules.preferences.XCommonManager.generateViewDOM(Unknown 
Source)
 at org.scilab.modules.preferences.XCommonManager.refreshDisplay(Unknown Source)
 at org.scilab.modules.preferences.XConfigManager.displayAndWait(Unknown Source)
 at org.scilab.modules.preferences.XConfigManager.openPreferences(Unknown 
Source)

** Affects: scilab (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

- When running scilab under openjdk-11 it fails with the following error (see 
bellow for the full output):
+ When running scilab under openjdk-11 it fails to open the preferences windows 
with the following error (see bellow for the full output):
  ERROR:  'Could not compile stylesheet'
  FATAL ERROR:  'The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.'
-            :The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.
+            :The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.
  Could not load file: 
/usr/share/scilab//modules/preferences/src/xslt/XConfiguration.xsl
  
- $ cat /etc/os-release 
+ $ cat /etc/os-release
  NAME="Ubuntu"
  VERSION="18.04.2 LTS (Bionic Beaver)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu 18.04.2 LTS"
  VERSION_ID="18.04"
  HOME_URL="https://www.ubuntu.com/";
  SUPPORT_URL="https://help.ubuntu.com/";
  BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/";
  
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy";
  VERSION_CODENAME=bionic
  UBUNTU_CODENAME=bionic
  
- 
  $ apt policy scilab
  scilab:
-   Installed: 6.0.1-7ubuntu1~18.04
-   Candidate: 6.0.1-7ubuntu1~18.04
-   Version table:
-  *** 6.0.1-7ubuntu1~18.04 500
-         500 http://192.168.122.1:9999/ubuntu bionic-proposed/universe amd64 
Packages
-         500 http://192.168.122.1:9999/ubuntu bionic-proposed/universe i386 
Packages
-         100 /var/lib/dpkg/status
-      6.0.1-1ubuntu1 500
-         500 http://192.168.122.1:9999/ubuntu bionic/universe amd64 Packages
-         500 http://192.168.122.1:9999/ubuntu bionic/universe i386 Packages
+   Installed: 6.0.1-7ubuntu1~18.04
+   Candidate: 6.0.1-7ubuntu1~18.04
+   Version table:
+  *** 6.0.1-7ubuntu1~18.04 500
+         500 http://192.168.122.1:9999/ubuntu bionic-proposed/universe amd64 
Packages
+         500 http://192.168.122.1:9999/ubuntu bionic-proposed/universe i386 
Packages
+         100 /var/lib/dpkg/status
+      6.0.1-1ubuntu1 500
+         500 http://192.168.122.1:9999/ubuntu bionic/universe amd64 Packages
+         500 http://192.168.122.1:9999/ubuntu bionic/universe i386 Packages
  The IP and port are due to the proxy (approx) I am running to speed up 
installs.
+ 
+ 
+ How to reproduce:
+ 1. open scilab in a terminal
+ 2. go to Edit -> Preferences (or click the Preferences icon in the toolbar)
+ 3. notice that the Preferences window does not show up and that the 
console/terminal will output an exception
+ 
+ Expected result:
+ Preferences window should show up.
  
  
  Full output from scilab:
  $ scilab
  Picked up _JAVA_OPTIONS: 
-Djava.class.path=/usr/share/java/flexdock.jar:/usr/share/java/skinlf.jar:/usr/share/java/looks.jar:/usr/share/java/commons-logging.jar:/usr/share/java/jhall.jar:/usr/share/java/lucene-core-4.10.4.jar:/usr/share/java/lucene-analyzers-common-4.10.4.jar:/usr/share/java/lucene-queryparser-4.10.4.jar:/usr/share/maven-repo/org/freehep/freehep-util/debian/freehep-util-debian.jar:/usr/share/maven-repo/org/freehep/freehep-io/debian/freehep-io-debian.jar:/usr/share/maven-repo/org/freehep/freehep-graphicsio/debian/freehep-graphicsio-debian.jar:/usr/share/java/freehep-graphicsio-emf-2.1.jar:/usr/share/java/freehep-graphics2d-2.1.1.jar:/usr/share/java/jrosetta-API.jar:/usr/share/java/jrosetta-engine-1.0.4.jar:/usr/share/java/jgraphx.jar:/usr/share/java/jogl2.jar:/usr/share/java/gluegen2-rt.jar:/usr/share/java/jeuclid-core.jar:/usr/share/java/jlatexmath-fop-1.0.7.jar:/usr/share/java/fop.jar:/usr/share/java/saxon.jar:/usr/share/java/batik.jar:/usr/share/java/xml-apis-ext.jar:/usr/share/java/commons-io.jar:/usr/share/java/xmlgraphics-commons.jar:/usr/share/java/avalon-framework.jar:/usr/share/java/jlatexmath-1.0.7.jar:/usr/share/java/ecj.jar:/usr/share/java/javax.activation.jar:/usr/share/java/jaxb-runtime.jar:/usr/share/scilab/modules/console/jar/org.scilab.modules.console.jar:/usr/share/scilab/modules/localization/jar/org.scilab.modules.localization.jar:/usr/share/scilab/modules/core/jar/org.scilab.modules.core.jar:/usr/share/scilab/modules/ui_data/jar/org.scilab.modules.ui_data.jar:/usr/share/scilab/modules/preferences/jar/org.scilab.modules.preferences.jar:/usr/share/scilab/modules/scirenderer/jar/scirenderer.jar:/usr/share/scilab/modules/scinotes/jar/org.scilab.modules.scinotes.jar:/usr/share/scilab/modules/external_objects_java/jar/org.scilab.modules.external_objects_java.jar:/usr/share/scilab/modules/types/jar/org.scilab.modules.types.jar:/usr/share/scilab/modules/gui/jar/org.scilab.modules.gui.jar:/usr/share/scilab/modules/renderer/jar/org.scilab.modules.renderer.jar:/usr/share/scilab/modules/history_manager/jar/org.scilab.modules.history_manager.jar:/usr/share/scilab/modules/graphic_export/jar/org.scilab.modules.graphic_export.jar:/usr/share/scilab/modules/graphic_objects/jar/org.scilab.modules.graphic_objects.jar:/usr/share/scilab/modules/javasci/jar/org.scilab.modules.javasci.jar:/usr/share/scilab/modules/history_browser/jar/org.scilab.modules.history_browser.jar:/usr/share/scilab/modules/jvm/jar/org.scilab.modules.jvm.jar:/usr/share/scilab/modules/xcos/jar/org.scilab.modules.xcos.jar:/usr/share/scilab/modules/graph/jar/org.scilab.modules.graph.jar:/usr/share/scilab/modules/action_binding/jar/org.scilab.modules.action_binding.jar:/usr/share/scilab/modules/completion/jar/org.scilab.modules.completion.jar:/usr/share/scilab/modules/helptools/jar/scilab_images.jar:/usr/share/scilab/modules/helptools/jar/scilab_ru_RU_help.jar:/usr/share/scilab/modules/helptools/jar/scilab_en_US_help.jar:/usr/share/scilab/modules/helptools/jar/org.scilab.modules.helptools.jar:/usr/share/scilab/modules/commons/jar/org.scilab.modules.commons.jar:
  WARNING: An illegal reflective access operation has occurred
  WARNING: Illegal reflective access by org.scilab.modules.jvm.LibraryPath 
(file:/usr/share/scilab/modules/jvm/jar/org.scilab.modules.jvm.jar) to field 
java.lang.ClassLoader.sys_paths
  WARNING: Please consider reporting this to the maintainers of 
org.scilab.modules.jvm.LibraryPath
  WARNING: Use --illegal-access=warn to enable warnings of further illegal 
reflective access operations
  WARNING: All illegal access operations will be denied in a future release
  libEGL warning: DRI2: failed to authenticate
  commons module not found.
  graphic_objects module not found.
  ui_data module not found.
  graph module not found.
  history_browser module not found.
  slint module not found.
  coverage module not found.
  ERROR:  'Could not compile stylesheet'
  FATAL ERROR:  'The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.'
-            :The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.
+            :The xsl:import element children must precede all other element 
children of an xsl:stylesheet element, including any xsl:include element 
children.
  Could not load file: 
/usr/share/scilab//modules/preferences/src/xslt/XConfiguration.xsl
  java.lang.reflect.InvocationTargetException
-       at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
-       at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
-       at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
-       at java.base/java.lang.reflect.Method.invoke(Method.java:566)
-       at 
org.scilab.modules.gui.events.callback.JavaCallBack$2.callBack(Unknown Source)
-       at 
org.scilab.modules.gui.events.callback.CommonCallBack.actionPerformed(Unknown 
Source)
-       at 
java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
-       at 
java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
-       at 
java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
-       at 
java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
-       at 
java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279)
-       at 
java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
-       at 
java.desktop/java.awt.Component.processMouseEvent(Component.java:6632)
-       at 
java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342)
-       at java.desktop/java.awt.Component.processEvent(Component.java:6397)
-       at java.desktop/java.awt.Container.processEvent(Container.java:2263)
-       at 
java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5008)
-       at 
java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
-       at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
-       at 
java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
-       at 
java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
-       at 
java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
-       at 
java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
-       at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2772)
-       at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
-       at 
java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
-       at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
-       at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
-       at java.base/java.security.AccessController.doPrivileged(Native Method)
-       at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
-       at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
-       at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
-       at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
-       at java.base/java.security.AccessController.doPrivileged(Native Method)
-       at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
-       at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
-       at 
java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
-       at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
-       at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
-       at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
-       at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
-       at 
java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
+  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
+  at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
+  at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
+  at java.base/java.lang.reflect.Method.invoke(Method.java:566)
+  at org.scilab.modules.gui.events.callback.JavaCallBack$2.callBack(Unknown 
Source)
+  at 
org.scilab.modules.gui.events.callback.CommonCallBack.actionPerformed(Unknown 
Source)
+  at 
java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
+  at 
java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
+  at 
java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
+  at 
java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
+  at 
java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279)
+  at 
java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
+  at java.desktop/java.awt.Component.processMouseEvent(Component.java:6632)
+  at 
java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342)
+  at java.desktop/java.awt.Component.processEvent(Component.java:6397)
+  at java.desktop/java.awt.Container.processEvent(Container.java:2263)
+  at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5008)
+  at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
+  at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
+  at 
java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
+  at 
java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
+  at 
java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
+  at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
+  at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2772)
+  at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
+  at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
+  at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
+  at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
+  at java.base/java.security.AccessController.doPrivileged(Native Method)
+  at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
+  at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
+  at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
+  at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
+  at java.base/java.security.AccessController.doPrivileged(Native Method)
+  at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
+  at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
+  at 
java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
+  at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
+  at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
+  at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
+  at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
+  at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
  Caused by: java.lang.NullPointerException
-       at 
org.scilab.modules.preferences.XCommonManager.generateViewDOM(Unknown Source)
-       at org.scilab.modules.preferences.XCommonManager.refreshDisplay(Unknown 
Source)
-       at org.scilab.modules.preferences.XConfigManager.displayAndWait(Unknown 
Source)
-       at 
org.scilab.modules.preferences.XConfigManager.openPreferences(Unknown Source)
+  at org.scilab.modules.preferences.XCommonManager.generateViewDOM(Unknown 
Source)
+  at org.scilab.modules.preferences.XCommonManager.refreshDisplay(Unknown 
Source)
+  at org.scilab.modules.preferences.XConfigManager.displayAndWait(Unknown 
Source)
+  at org.scilab.modules.preferences.XConfigManager.openPreferences(Unknown 
Source)

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https://bugs.launchpad.net/bugs/1821842

Title:
  failed to open scilab preferences due to xsl error

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