Hi :)
I think you should NOT be using trying to run as SuperUser by su or sudo or 
anything.  It should work without that but i agree it was a good idea to give 
it a go to see what happens.  

Can you try adding the tag

-v

or 

--verbose

to see if it gives you more output to explain what is going wrong?  Perhaps 
something like 

/opt/libreoffice4.0/program/soffice --headless -v --convert-to pdf sample.ppt

I'm not sure if position matters but i think it doesn't.  If it does then i've 
probably put it in the wrong place.  You can find out more about the tags that 
can be used in Gnu&Linux by just using the tag

-h 

or 

--help

Btw the double - and full word seems to be the newer way but not everyone has 
caught up yet so sometimes programs still need the shorter tag or are happy 
with either.  Its getting less messy like that now but it takes time for an 
evolution like that to ripple outwards.  Machines in remote places might be 
worth holding back from radical upgrades just in case something does go wrong.  
No-one wants to go for a long hike in space just to plug a keyboard in and sit 
doing coding work.  
Regards from
Tom :)  






>________________________________
> From: Graham Glass <[email protected]>
>To: [email protected] 
>Sent: Thursday, 28 March 2013, 2:57
>Subject: [libreoffice-users] --convert-to always fails silently on Ubuntu
> 
>Hi everyone,
>
>I just downloaded libreoffice 4 and installed it on a Mac (Lion) and Linux
>(Ubuntu). On the Mac, everything works exactly as I expected, and I can
>easily convert documents to pdfs using the command line tool like this:
>
>/Applications/LibreOffice.app/Contents/MacOS/soffice --headless --convert-to
>pdf sample.ppt
>
>However, on Unbuntu, when I execute the equivalent command, it always fails
>quickly and silently with exit code 77 (Permission denied). 
>
>/opt/libreoffice4.0/program/soffice --headless --convert-to pdf sample.ppt
>
>This failure happens regardless of whether I am a regular user or superuser.
>I am not running libreoffice via a user interface, and this command is being
>executed on an Amazon EC2 headless machine.
>
>Can someone offer any advice, either a method to get more error information
>(such as a log file or a verbose flag) so I can figure out what's going on?
>I'm sure it's a simple issue, but right now the lack of error reporting is
>making it hard to get the issue resolved.
>
>Thanks in advance!
>
>Cheers,
>Graham
>
>
>
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>
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