Convert DWG to previous version (KEEPING CIVIL Design attributes)

[Anonymous]

Yes, I have done some search on this topic, and see multitude of responses, namely to use DWG TrueView.

This application is not acceptable since I need the converted file to retain the Civil3D features.  I don't know for sure what version was used for the design (communications are in progress) but Windows thinks it was 2011, and viewing the DWG in notepad++ shows the 2013 code.  I'm trying to load the file into civil3d 2015, but on import all objects get converted to proxies along with the warning that the file was generated by a newer version, and nothing can be edited.

Are these files truly not backwards compatible?  Even if the design elements are basic alignment, profile, etc.?

Any alternatives short of going back to the file provider and requesting save as (ie, is there no working DWG-as-civil3d converter)?

Thx

[tmachado · Accepted solution]

Hi @Anonymous C3D it is not backward compatible and is release related and specific, that means that you can move forward but not back.

This article could work http://civil3dbtf.blogspot.com/2017/04/what-is-new-in-autocad-civil-3d-2018.html

No even a regular line my friend, anything that is generated on one of the vertical application is considered as an AECC feature for another ACAD based software...

You can do a _AECEXPORTTOAUTOCAD2013 but this will break the intelligent of the AECC features 

[Anonymous]

OK, thanks.  I understand file format change != backwards compatible.

Fortunately I do have an alternative, since there are landxml files included.