Marius,
That error I think usually means that your word\document.xml file has been truncated because the entire docx file has been truncated. This can occur for a number of reasons, but these days a common cause is because you are using "fake" USB memory. These
memory sticks report to the operating system that they say have 128MB of size but are actually say only 8GB big. When that 8GB limit is reached, old data is thrown away to fit new data, or the new data over the limit is simply thrown out.
You can test if you have one of these bad memory stick or cards by using FAKEFLASHTEST.exe which is explained and can be downloaded and installed for free here:
http://www.rmprepusb.com/tutorials/-fake-usb-flash-memory-drives.
In order to salvage the file you have, post it in a public folder on Dropbox or some other publicly available place and let Rohn007, Doug Robbins, Jeeped or me have access to the file.
You can also try my piece of freeware here, which may fix the file. Also a quick way to fix files like yours has become apparent to me and might work. First fix the zip structure with a freeware program like
Izarc or Corrupt Extractor for Microsoft Office. The zip repair function is on the Tools menu
of Izarc and on the main menu of Corrupt Office 2007 Extractor and simply called "Repair" there. After that, simply try to open the file in Windows WordPad. WordPad is found Word Accessories Folder in the Programs section of the Windows 10 or earlier Start
Menus. If the file opens in WordPad, save it under a new name and try to reopen it in Microsoft Word.
Also take a look at these two Microsoft articles regarding finding unsaved, previous version, temporary, automatically backed up, deleted and lost Word files:
Good luck! We are happy to help you repair/salvage the document if you post it publicly where we can access it. Also if you want to send the file to my Email address at
******@s2services.com, I'll do it for free.
Paul Pruitt (socrtwo)