Impress to save as PPTX losing slides when opening with powerpoint

[blashrkh]

using.phone.to.type.this so.sorry if there are typos.

preparing presentation for brother’s funeral tomorrow in LO impress
exporting./.save as .pptx and opening with powerpoint requests a repair, which then loses about 20 slides.

does.anyone know.of any.formats.completely.compatible.with powerpoint?
seemed to lose.l.around 20 of 70 slides… photos.only, no text except for 1st slide.

slides appear.as.blank in powerpoint.

any ideas?

[keme]

How does Powerpoint react if you save as ODF presentation (.odp file) and try to open that?

[EarnestAl]

There are two pptx formats, try the 2007-365 version rather than OfficeOpenXML. Otherwise, the older format, ppt, might be a better bet.

I tried saving in Impress an existing presentation but all versions opened OK in Powerpoint 2010 however there were very few pictures and no fancy transistions or timed sequences.