Environment:
SDDM 4.0 EA1
Microsoft Windows 7
No SVN
I have a smallish design (51 entities, 44 tables in 2 models, 7 schemes, 6 subviews, and 3 physical models) and SDDM trashed my Logical Diagram when I imported from Designer. Oracle has never been very good with automatically redrawing data models and it appears after importing one table from designer it attempted to redraw the logical and now relationship lines are going in every direction. Luckily I save early and often to I went back to the saved copy and got my layout back. As a workaround I was able to import from the Oracle Data dictionary and it works fine.
Marcus Bacon