@gotphish001 wrote:
New .dwg format I believe.
Yes, it is a new drawing file format.
Not necessarily directed at @gotphish001, but as a reminder to all: AEC Objects are not backwards compatible with previous file formats. It has been that way since nearly forever. We have had a bit a reprieve, with the 2013 format lasting five years, but just like the in the 2004, 2007, 2010 and 2013 releases, once you open a file in 2018, the AEC objects are promoted to the new format, and if you save that file, they remain in the 2018 format, no matter what file format you choose when saving.
There is no way for all parties to edit AEC objects while working in releases based on two different file formats.
For example, if you save to the 2013 file format from 2018, and then try to open that file in ACA 2013, 2014, 2015, 2016 or 2017, ACA will detect the future objects and will disable all AEC commands. You can do AutoCAD editing, save the file and then reopen it in 2018 with the AEC objects intact, but you will not be able to use any AutoCAD Architecture commands while in an earlier release.
David Koch
AutoCAD Architecture and Revit User
Blog | LinkedIn
