micorsoft word version problems

Hello,
I try to explain to you a problem I'm having with different version of word.
I've a template written with word 2010 and i create several documents from it.
Both word 2007 and word 2013 read them without problems.
From the generated documents I create a cumulative one, using tbszip and appending any single body to the cumulative doc.
Well, the big document is readable using word 2007 but not using word 2013.
Have you got any idea about the reason of it? I'd attach my files but I can't find your email anymore...
I just ask you because you were very helpful when I had other kind of problems before.
Thanks a lot, anyway!!!

Hi,

Conctenate document content can be very hazardous. The Ms Office documents use several internal links to other resources (styles, graphics, images, ...) that me be missing or becoming inconsistent when moves into other document.
I can have a look, my email is here : http://www.tinybutstrong.com/onlyyou.html