You've got the wrong version of InDesign to open the file, it's that simple.
InDesign Cs6 is available on Creative Cloud, and if that's up to date it won't open InDesign CC or InDesign CC 2014 files.
You'll need to download InDesign CC2014 from the Creative Cloud.
I'm running the latest creative cloud and cs6 either won't open the file i have been supplied
What version is "the latest" for you?
it says "Indesign CC - Version 9" in my about indesign
CS6 is not the latest version of InDesign - as per my post above.
- InDesign CS6 (8.0)
- InDesign CC (9.2)
- InDesign CC 2014 (10)
You need to Download InDesign CC 2014