title: The file <filename> cannot be opened because there are problems with the contents.In some cases
body: <p>I am copying any document to my office-addin 2010. It gives error for only in some unpredictable cases, when copy the contents of word document and open office-addin - 
  The file  cannot be opened because there are problems with the contents.  Details: Microsoft Office can't open this file because some parts are missing or invalid.  Location: Part: /word/document.xml, line: 1, column: 0
  It ask Do you want to recover the contents of the document?
  Then open it in another document.</p>