Open Source Document Management System | OpenKM

Hello,
I've installed OpenKm Community on my Centos 7 server, I can see pdf's preview correctly but I don't be able to see images (any type) or docs previews.
This is my configuration check:
What should I check on my configuration?
Thanks in advance, regards. Stefano.

Check if you have a soffice.bin process running, I suspect the libreoffice service is not starting at OpenKM startup might be some error is shown there.
Ensure you have installed the packages headless, pyuno and ure Usually in centos is not installed by default the headless what is mandatory to start libreoffice as service.

Thanks for your response, the results are shown below:

rpm -qa | grep libreoffice

libreoffice-langpack-it-5.0.6.2-14.el7.x86_64
libreoffice-pyuno-5.0.6.2-14.el7.x86_64
libreoffice-pdfimport-5.0.6.2-14.el7.x86_64
libreoffice-base-5.0.6.2-14.el7.x86_64
libreoffice-impress-5.0.6.2-14.el7.x86_64
libreoffice-calc-5.0.6.2-14.el7.x86_64
libreoffice-5.0.6.2-14.el7.x86_64
libreoffice-ure-5.0.6.2-14.el7.x86_64
libreoffice-graphicfilter-5.0.6.2-14.el7.x86_64
libreoffice-opensymbol-fonts-5.0.6.2-14.el7.noarch
libreoffice-emailmerge-5.0.6.2-14.el7.x86_64
libreoffice-core-5.0.6.2-14.el7.x86_64
libreoffice-draw-5.0.6.2-14.el7.x86_64
libreoffice-math-5.0.6.2-14.el7.x86_64
libreoffice-writer-5.0.6.2-14.el7.x86_64

I think that the problem is in the next row:

openkm 6343 0.0 0.0 0 0 ? Z 16:53 0:00 [soffice.bin] <defunct>

There is a way to resolve it?
Regards, Stefano.

Hello,
I think that I've all packages installed:

libreoffice-langpack-it-5.0.6.2-14.el7.x86_64
libreoffice-pyuno-5.0.6.2-14.el7.x86_64
libreoffice-pdfimport-5.0.6.2-14.el7.x86_64
libreoffice-base-5.0.6.2-14.el7.x86_64
libreoffice-impress-5.0.6.2-14.el7.x86_64
libreoffice-calc-5.0.6.2-14.el7.x86_64
libreoffice-5.0.6.2-14.el7.x86_64
libreoffice-ure-5.0.6.2-14.el7.x86_64
libreoffice-graphicfilter-5.0.6.2-14.el7.x86_64
libreoffice-opensymbol-fonts-5.0.6.2-14.el7.noarch
libreoffice-emailmerge-5.0.6.2-14.el7.x86_64
libreoffice-core-5.0.6.2-14.el7.x86_64
libreoffice-draw-5.0.6.2-14.el7.x86_64
libreoffice-math-5.0.6.2-14.el7.x86_64
libreoffice-writer-5.0.6.2-14.el7.x86_64

but in the processes:

openkm 6341 0.0 1.2 983020 48300 ? Sl 16:53 0:00 /usr/lib64/libreoffice/program/soffice.bin -accept=socket,host=127.0.0.1,port=2002;urp; -env:UserInstallation=file:///home/openkm/tomcat-7.0.61/temp/.jodconverter_socket_host-127.0.0.1_port-2002 -headless -nocrashreport -nodefault -nofirststartwizard -nolockcheck -nologo -norestore
openkm 6343 0.0 0.0 0 0 ? Z 16:53 0:00 [soffice.bin] <defunct>
root 6689 0.0 0.0 112680 964 pts/1 R+ 17:07 0:00 grep --color=auto soffice

Is here the problem? What can I do?
Regards. Stefano.

I think is right ( stop OpenKM, ensure there's no soffice running and then start OpenKM ).
Create the doc file with libreoffice ( or at least try first opening in your computer to be sure the format is compatible with libreoffice, sometimes the latests versions of documents created by Ms Office are not able to being opened by libreoffice ).

i'm using CentOS 7 64bit with no problem

Look for a package named libreoffice-headless-***** or similar