Can you save a file created in Revit Architecture 2011 to an earlier version and open it in that earlier version?
A1. No! Revit has no means of saving its project file from any release back to early releases. So Revit Architecture 2011 cannot be saved back or opened by Revit Architecture 2010, or earlier. There is simply no backward compatibility. This is because as Revit building elements and components are enhanced with new features and new commands that allow improvements in Revit elements and components linking and constraint relationships there is no way to support it in a prior release that did not support the same parametric relationships. That is why it is critical for Revit users to be on subscription and maintain the latest release or make sure that any work they do and any consultants involved using Revit MEP or Revit Structure must be using the same release.
