<r>Puybaret, you are right!<br/>
<br/>
wood, just add the checkOffScreenSupport option when invoking sweethome3d. Your path may defer. <B><s>[b]</s>dpkg -L sweethome3d<e>[/b]</e></B> will show you where the sweethome3d.jar file is. It maybe:<br/>

<CODE><s>[code]</s><i>
</i>java -Dcom.eteks ...

Just go to the download page http://www.sweethome3d.com/download.jsp download the Web Starter http://www.sweethome3d.com/SweetHome3D.jnlp and open it with javaws

<r>This is odd, it did only show the splash screen. Today that command starts the whole application but crashed when opening Preferences.<br/>
<br/>
Changing the arguments order as you said, makes Preferences work, thanks!<br/>

<CODE><s>[code]</s>java -Dcom.eteks.sweethome3d.j3d ...

<r><QUOTE><s>[quote]</s>Are you sure that the .jar file you tried in the command is the Jar executable file available at the end of <URL url="http://www.sweethome3d.com/download.jsp"><s>[url=http://www.sweethome3d.com/download.jsp]</s>Download page<e>[/url]</e></URL>?<e>[/quote]</e></QUOTE>

In Arch ...

<r>The web method worked.<br/>
I installed icedtea-web 1.6.1, which provides javaws, then using the jnlp file <URL url="http://www.sweethome3d.com/SweetHome3D-NoOffscreen.jnlp">http://www.sweethome3d.com/SweetHome3D-NoOffscreen.jnlp</URL> from the FAQ:<br/>

<CODE><s>[code]</s>javaws SweetHome3D ...

<t>I also need to only change the measurements system to metric (the international). How to do it? Editing some config file?<br/>
<br/>
java -jar /usr/share/java/sweethome3d.jar -Dcom.eteks.sweethome3d.j3d.checkOffScreenSupport=false<br/>
<br/>
Doesn't work.<br/>
<br/>
Arch Linux, jre8-openjdk 8.u66 ...