Incompatible things between AutoCAD 2009 and 2007

[NerdlingOne]

Even though the drawing format is the same, there are some things that are not compatible between 2009 and 2007. I can list a few.

- Multileaders - if multileaders are used in 2009 and the drawing is opened in 2007 then they become frozen proxy objects.
- Multiline text in an attribute tag - If you use multiline text in a tag in an attribute in 2009 and open it in 2007, the block will create a tag for each line of text (TAG_001, TAG_002, ETC.)
- Annotative Scaling - If you use Annotative scaling in 2009 and open it in 2007, each annotative scale size will be converted to a layer so the user can freeze and thaw the scaled text they don't want. (DIM_10, DIM_20, DIM_40, etc.)

Anything else?

[irneb]

What you mention is actually the differences between 2007 & 2008. 2009 doesn't really have anything "new" in that sense ... it's more of a cosmetic difference (not counting the 3D commands).

You can see these differences as similar to the DynamicBlocks available in 2005 but not in 2004, even though both (as well as 2006) use the 2004 DWG version. The proxy objects idea is simply to have some minimum backward compatibility for the new entity types.

BTW, the annotative thing only happens if SaveFidelity = 1 in 2008+ versions.

So you can expect such incompatibilities every time a new AC brings new entity types.