That is a very bad workflow.
You need to save as IDML from CS6 and open that but text is going to reflow and if you used any new features they’ll be lost or badly mangled.
Haha. Agreed! I only modified one sentence and changed the position of a picture as it was needed in the moment, but I guess I didn't save it correctly. Daggome.
Working in academia can be great, but when it can't keep its software licenses current, it's rather painful...
To be frank, you’re three versions out of date yourself. Be aware that this will pop up is someone sends you a file creating in CC.
Understood. Thanks for your time.