Hi Link,
I opened one in Notepad and it gave:AC1021. I'm not clear how to relate that to a version of autocad.
But, right-clicking on the DWG it gave me the orginal creation date as 2004.
PROPERTIES>STATISTICS> Thursday, October 28, 2004 7:05.11 AM
I checked that the translators I was using included 2004. Just did a new one in case. That it had created a new layout with DWG once I would have thought meant the translator was ok.
I have systematically gone through all the translators. It is not even trying to create one.
What else about these DWGs might I check?
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"