Aec Objects

[snuhn]

I created a file in Autocad 2010 then opened and saved in 2011 and exported back to 2010.  All AEC objects are now one large block on layer AecObjExplode...  How can I make them walls and doors, etc... again?

[pendean]

Since 2010 and 2011 (and presumably the near future 2012) are the same exact format and required no 'exporting' between them at all, it would seem you unintentially destroyed the file in 2011 and removed all AEC content. There is no recovering from that.

Hopefully you still have the original file backed up somewhere to recover.