Sometimes Microsoft document files may not be able to be opened normally in Word due to some minor corruption, in which case you will see this error:
WE'RE SORRY. WE CAN'T OPEN XXXX.DOCX BECAUSE WE FOUND A PROBLEM WITH ITS CONTENTS
You are then prompted to try and open and fix it, and in many cases Word can fix these.
This causes a problem for applications like Medilink which show previews because the previews won't work, and also because fixing these manually is tedious.
If this happens there is a utility here which can be placed in your SCANS folder or individual LETTERS\<MONTH> folders to try and auto find and fix problematic DOCX files.