https://forums.autodesk.com/t5/revit-architecture-forum/using-revit-lt-2015-with-revit-2015/m-p/5455597#M341846 <P>i recommend starting here:</P> <P>Interoperability between Revit LT and Autodesk Revit <A href="http://help.autodesk.com/cloudhelp/2015/ENU/Revit-Collaborate/files/GUID-89BACB84-7B3F-44E3-A4A9-73507FAF23E3.htm" target="_blank">http://help.autodesk.com/cloudhelp/2015/ENU/Revit-Collaborate/files/GUID-89BACB84-7B3F-44E3-A4A9-73507FAF23E3.htm</A></P> Tue, 30 Dec 2014 19:42:47 GMT DarrenP 2014-12-30T19:42:47Z