PPT File altered upon file open

PPT File altered upon file open

Post by Steve Rind » Thu, 18 Sep 2008 20:33:48


In article < XXXX@XXXXX.COM >,


No, there isn't.

You might try opening the files with the PPT Viewer instead of PPT itself; I
suspect it won't make any changes to the file.

-----------------------------------------
Steve Rindsberg, PPT MVP
PPT FAQ: www.pptfaq.com
PPTools: www.pptools.com
================================================
Live and in personable in the Help Center at PowerPoint Live
Sept 21-24, San Diego CA, USA
www.pptlive.com
 
 
 

PPT File altered upon file open

Post by Bastien Co » Thu, 18 Sep 2008 22:30:48

I have noticed that opening a PPT file with PowerPoint (2003 SP3)
causes the file to be immediately altered.

I checked with one of my Powerpoint file (PPT) and just opening it
without saving caused the file to be altered in the following way:
- 2560 bytes of data were added at the end of the file
- an hexadecimal diff tool showed that the file had been altered in a
number of locations

I am using a Version Control System (subversion) and it is really
annoying to have files marked as "changed" even if I only looked at
them.

Is there a way to change this behavior of PowerPoint ?

Thanks,

Bastien Continsouzas

 
 
 

PPT File altered upon file open

Post by Bastien Co » Fri, 19 Sep 2008 18:07:11

> You might try opening the files with the PPT Viewer instead of PPT itself

Yes, that worked fine, thanks

For the sake of knowledge, I tried to track down the changes made to
the files and what was causing them:

- A simple presentation created from scratch is not altered when
opened so this is probably not a timestamp update (last time
viewed...)
- I renamed the previous presentation and it was not altered so this
is probably not due to the name of the file being stored in it
- I moved the previous presentation and it was not altered so this is
probably not due to the path of the file being stored in it
- I added the date and time in the footer and set it to automaticaly
update and it was not altered

I tracked the changes using and Hex diff tool one one of my existing
presentations.
I found that this time, data was removed from the file instead of
being added.

I found that the data removed (at least the textual one) only appeared
in the properties and was written in two locations before opening the
file and only in one location after that (hence the removed data).

I still find this behaviour annoying but at least I have a workaround.

---
Bastien Continsouzas
http://www.yqcomputer.com/
 
 
 

PPT File altered upon file open

Post by Steve Rind » Fri, 19 Sep 2008 19:14:02

Thanks for the interesting update and add'l information.

I agree that it's odd to have an application write data back to a file when you
specifically do NOT save it. I'll pass this along to MS ... you're not the first
person to be annoyed by it.

In article < XXXX@XXXXX.COM >,
Bastien Continsouzas wrote:

-----------------------------------------
Steve Rindsberg, PPT MVP
PPT FAQ: www.pptfaq.com
PPTools: www.pptools.com
================================================
Live and in personable in the Help Center at PowerPoint Live
Sept 21-24, San Diego CA, USA
www.pptlive.com

 
 
 

PPT File altered upon file open

Post by Steve Rind » Sat, 20 Sep 2008 00:03:46

nother question for you:

Do you have any add-ins or other applications loaded that might be altering the
file or causing PowerPoint to make changes to files as you open/close them?

I'm trying to reproduce the file change problem but so far haven't been able to
do it. Can you give me some step by step instructions that reliably produce the
problem on your system? I'll try it here to see if it happens.

In article < XXXX@XXXXX.COM >,
Bastien Continsouzas wrote:

-----------------------------------------
Steve Rindsberg, PPT MVP
PPT FAQ: www.pptfaq.com
PPTools: www.pptools.com
================================================
Live and in personable in the Help Center at PowerPoint Live
Sept 21-24, San Diego CA, USA
www.pptlive.com