Auto Architecture 2009 compatability with 2011

[Anonymous]

Having problems with drawing file conversions from 2011 to 2009. I work at home on my 2011 version. Then go to school and try to use there 2009 version and it tends to turn my files to line drawings from 2007 or 2004. Not able to convert back so I can work on them at school.

Anyone have any suggests on how I might solve this problem without having to start over.....Please Help....

Thanks, 

Darren

[David_W_Koch]

2009 uses the 2007 file format.  2011 uses the 2010 file format.  AEC Objects can not be maintained in a state that will be usable in a release that makes use of a previous file format when "saving as" to that earlier file format.