What versions of AutoCAD work with RMS?

Currently RMS supports AutoCAD R12 and R13, both DOS
and Windows versions, and AutoCAD R14.

For R12, C1 and C2 are really unstable and the users
might encounter unpredictable problems.

For R13, RMS checks the version. RMS will display an
error message if the user is using C3 or earlier versions.
In other words, RMS supports C3a or later.