I am sorry you are having trouble with opening your files in Revit. At this point, we only support Revit 2015 and later with our file conversion. Another option you have, if you are using the iPad version, is to import the SAT file that is created automatically along with the Revit file. I hope this helps.
Ok thanks for your reply, I accually had to re-do it on revit 2014.
One other quick question I have.
I used to render on Lumion, but at the moment I dont have an access to the program.
Now I asked my friend to render for me and the challenge he is using Attlantis and am on revit.
How do I export revit model for Attlantis renders?
I would suggest exporting from Revit as FBX - then import that to Artlantis. It looks like that is supported.