You need to check what user is really used. Try this out!
 ps aux|grep java|grep -v grep|awk '{print $1}'
 
This command should give you a least the user currently running the wiki,
so replace 'xwiki' by this user, to run the following command (it was not
bin/ but program/)
  sudo -u $USER
/usr/lib64/openoffice.org/program/soffice.bin 
If this file is still not found, perform a search on your system ("find"
command, or "locate", for soffice.bin).
Finally, replace the server profile (in xwiki.properties :
openoffice.profilePath)
by the home directory of that user. For example '/home/tomcat/.
openoffice.org/3'#39;. If you successfully run the soffice.bin command with
that user, you should have a '.openoffice' directory created inside. In
fact, the default value of openoffice.profilePath is "/home/user/.
openoffice.org/3"quot;, so just replace user with the current XWiki user, fix
the rights if necessary and that's all.
And restart XWiki.
2013/10/23 MaryJane <mgpardi(a)exis.it>
  hi Guillaume thank for your reply, the open office
version is the 3.3
 the properties in the "OpenOffice Server" panel are :
 SERVER TYPE
 Internally managed (local)
 SERVER PORT
 8100
 AUTO START
 Yes
 SERVER PATH
 /opt/openoffice.org3/
 SERVER PROFILE
 /opt/openoffice.org/
 SERVER STATE
 Not connected
 if I try the command
 sudo -u xwiki /usr/lib64/openoffice.org/bin/soffice.bin
 I receive sudo: unknown user: xwiki
 (furthermoreI haven't the /bin directory )
 --
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