https://forums.autodesk.com/t5/revit-structure-forum/revit-version/m-p/6208206#M43429 <P>In short...you can not. Revit is not backwards compatible. As soon as a Revit file is opened and and saved in a later version, earlier versions will not be able to open it again.</P> <P>&nbsp;</P> <P>The only possible route would be to export it to IFC and import the IFC in the older version. However you will loose all the parametric stuff.</P> <P>&nbsp;</P> Thu, 10 Mar 2016 09:06:11 GMT L.Maas 2016-03-10T09:06:11Z https://forums.autodesk.com/t5/revit-structure-forum/revit-version/m-p/6208104#M43428 <P>hello all,&nbsp;</P><P>&nbsp;</P><P>how can i change revit file version 2015 to revit file 2014</P><P>&nbsp;</P><P>thanks in advanced</P> Thu, 10 Mar 2016 08:12:21 GMT https://forums.autodesk.com/t5/revit-structure-forum/revit-version/m-p/6208104#M43428 A_MAQ 2016-03-10T08:12:21Z https://forums.autodesk.com/t5/revit-structure-forum/revit-version/m-p/6208206#M43429 <P>In short...you can not. Revit is not backwards compatible. As soon as a Revit file is opened and and saved in a later version, earlier versions will not be able to open it again.</P> <P>&nbsp;</P> <P>The only possible route would be to export it to IFC and import the IFC in the older version. However you will loose all the parametric stuff.</P> <P>&nbsp;</P> Thu, 10 Mar 2016 09:06:11 GMT https://forums.autodesk.com/t5/revit-structure-forum/revit-version/m-p/6208206#M43429 L.Maas 2016-03-10T09:06:11Z