LibreOffice error message about incompatibility

[livram79]

I created a powerpoint presentation with LibreOffice Impress and saved it as .ppt. When I try to open it an error message pops up. Please see attachment.
Isn't this a bug?

I was able to open it before.

[proxima_centauri]

Was the file local to begin with? Did you go saving between LibreOffice and Microsoft Office?
Can you reproduce the behaviour with new .ppt created in Libreoffice?

[livram79]

Was the file local to begin with? Did you go saving between LibreOffice and Microsoft Office?
Can you reproduce the behaviour with new .ppt created in Libreoffice?

I did Not use Microsoft Office at all. The file was created with LibreOffice Impress on my computer (saved as .ppt) and I cannot open it now. I was able to open it before I added a few more pictures to it. It is very strange. That makes me believe it is a bug.

[proxima_centauri]

Can you reproduce the error following the same steps?

[italovignoli]

You should never use PPT (or DOC, or XLS) to save your documents, because it is not a native format, and - in addition - is not a standard, open, documented and easy to reproduce format. You should always use ODP to save the documents, and PPT - if necessary - to share them with MS Office users (prior to MS Office 2007 and 2010, as these software can read ODP). ODP is a standard, open, documented and easy to reproduce format, based on XML (which means that you will never lose your contents even if the file gets corrupted). Unfortunately, the PPT - being not standard, etcetera - does not allow to understand what has happened.

When you save using a non standard MS Office format, you see a Windows that tells you "you might lose some features...". This window it is not there just to add another window, but because there are real risks while using that format.

[livram79]

You should never use PPT (or DOC, or XLS) to save your documents, because it is not a native format, and - in addition - is not a standard, open, documented and easy to reproduce format. You should always use ODP to save the documents, and PPT - if necessary - to share them with MS Office users (prior to MS Office 2007 and 2010, as these software can read ODP). ODP is a standard, open, documented and easy to reproduce format, based on XML (which means that you will never lose your contents even if the file gets corrupted).

Thank you for advice.

[Arran]

Italovignoli's comment is basically correct, but the real method is: save your documents (in all LibreOffice modules) first as a native LibreOffice file:
Writer = *.odt, Calc = *.ods, Impress = odp, Draw = odg (but Inkscape is the much better program for Vector graphics). I never used the Base and Math modules. Please dont use either Writer nor Impress for any desktop-publication jobs, Scribus is again much better suited for those jobs.