[Bug 2139244] Re: Null Pointer Exception in Sweet Home 3D Design Software with KDE and Java

Tue Jan 27 21:35:24 UTC 2026

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

Bug reporting is about finding & fixing problems thus preventing future
users from hitting the same bug.

I suspect a Support site would be more appropriate, eg.
https://answers.launchpad.net/ubuntu. You can also find help with your
problem in the support forum of your local Ubuntu community
http://loco.ubuntu.com/ or asking at https://askubuntu.com or
https://discourse.ubuntu.com/t/welcome-to-support-and-help/49951, or for
more support options please look at
https://discourse.ubuntu.com/t/community-support/709

I've marked this bug report as incomplete; it can be changed to a
question, but you've filed it against the Ubuntu-Release-Upgrader
package which would be used to change a 24.04 system to 25.10 or 26.04;
but there is no evidence you've attempted to release-upgrade your system
(ie. initiate the tool to move/upgrade your installed system to a newer
release).

Sweet Home 3D Design Software sounds like a 3rd party app; which isn't
handled by the Ubuntu Release Upgrader process anyway (it only performs
upgrades on Ubuntu repository packages). Java isn't used; it's just a
system package that gets upgraded with the rest of your installed Ubuntu
packages.

To file bugs against a 3rd party package, you need to use the bug
tracker of the software involved (ie. Sweet Home 3D Design Software).
That can usually be found where the software is installed from (No
results for a package named sw3d in Ubuntu repositories)

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/2139244

Title:
  Null Pointer Exception in Sweet Home 3D Design Software with KDE and
  Java

Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid

Bug description:
  I installed SW3D from the latest website version. I tried from the
  desktop icon and the terminal and got a Null Pointer Exception (see
  output below).

  I was running version 7.5 on the same machine under Debian_MX-Linux 21 with XFCE without problem.
  I tried the snap version from the Ubuntu repository. It works but is outdated version 6.6 and does not open correctly models created with version 7.5. The flatpak version 7.5 found here https://flathub.org/en/apps/com.sweethome3d.Sweethome3d doesn't work either (files not found and null pointer exception).

  Tried other versions of Java without success.

  Reference for more details
  https://www.sweethome3d.com/support/forum/viewthread_thread,14505;jsessionid=32B4A57A9BE8BC11AFC242065F372A07.web-
  prod-2

  ./SweetHome3D-Java3D-1_5_2
  -e 
  # List Sweet Home 3D script ====================================================================

  ./SweetHome3D-Java3D-1_5_2
  #!/bin/sh

  echo -e "\n# List Sweet Home 3D script ====================================================================\n"
  echo $0
  cat $0

  # Retrieve Sweet Home 3D directory
  PROGRAM=`readlink "$0"`
  if [ "$PROGRAM" = "" ]; then
    PROGRAM=$0
  fi
  PROGRAM_DIR=`dirname "$PROGRAM"`

  # Original RUNTIME setting
  RUNTIME="$PROGRAM_DIR"/runtime
  # Change "$PROGRAM_DIR"/runtime to /usr/java/jre1.8.0_481 in ~/SweetHome3D-7.5/SweetHome3D-Java3D-1_5_2
  #RUNTIME=/usr/java/jre1.8.0_481
  # Change "$PROGRAM_DIR"/runtime to /usr/lib/jvm/java-21-openjdk-amd64 in ~/SweetHome3D-7.5/SweetHome3D-Java3D-1_5_2
  #RUNTIME=/usr/lib/jvm/java-21-openjdk-amd64

  # Run Sweet Home 3D
  echo -e "\n#  Run Sweet Home 3D ====================================================================\n"

  exec "$RUNTIME"/bin/java -Xmx2g -classpath "$PROGRAM_DIR"/lib/SweetHome3D.jar:"$PROGRAM_DIR"/lib/Furniture.jar:"$PROGRAM_DIR"/lib/Textures.jar:"$PROGRAM_DIR"/lib/Examples.jar:"$PROGRAM_DIR"/lib/Help.jar:"$PROGRAM_DIR"/lib/batik-svgpathparser-1.7.jar:"$PROGRAM_DIR"/lib/jeksparser-calculator.jar:"$PROGRAM_DIR"/lib/iText-2.1.7.jar:"$PROGRAM_DIR"/lib/freehep-vectorgraphics-svg-2.1.1c.jar:"$PROGRAM_DIR"/lib/sunflow-0.07.3i.jar:"$PROGRAM_DIR"/lib/jmf.jar:"$PROGRAM_DIR"/lib/j3dcore.jar:"$PROGRAM_DIR"/lib/j3dutils.jar:"$PROGRAM_DIR"/lib/vecmath.jar:"$PROGRAM_DIR"/lib/jnlp.jar -Djava.library.path="$PROGRAM_DIR"/lib:"$PROGRAM_DIR"/lib/yafaray -Dcom.eteks.sweethome3d.applicationId=SweetHome3D#Installer com.eteks.sweethome3d.SweetHome3D -open "$1"
  -e 
  #  Run Sweet Home 3D ====================================================================

  Java 3D: implicit antialiasing enabled
  Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
          at sun.awt.X11FontManager.getFileNameFromPlatformName(X11FontManager.java:174)
          at sun.font.SunFontManager.initCompositeFonts(SunFontManager.java:3481)
          at sun.font.SunFontManager.access$700(SunFontManager.java:65)
          at sun.font.SunFontManager$2.run(SunFontManager.java:545)
  (etc...)

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: ubuntu-release-upgrader-core 1:24.04.27
  ProcVersionSignature: Ubuntu 6.14.0-37.37~24.04.1-generic 6.14.11
  Uname: Linux 6.14.0-37-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Tue Jan 27 14:40:26 2026
  InstallationDate: Installed on 2025-11-11 (77 days ago)
  InstallationMedia: Kubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)

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