I want to do some work on a document.xml file. I created a Word document which gave me the .docx file. I added the .zip extension and when I unarchived it, it become the document folder. In the document.xml, I could find the specific test that I was interested in ediging. I made some changes, closed file. I then archived and removed the .zip extension. Apple Pages wanted to open but both times, I got 'An unkown error occured' as output. Am I doing something wrong or is there some say to rectify?