Adobe 26001360 - Illustrator CS - PC Manual page 282

282
Notes
A singular matrix cannot be inverted.
Example 108.1
-- This script gets an identity matrix and then
-- test to see if it can be inverted (if not singular)
-- If it can, then it inverts it
tell application "Illustrator CS"
set someMatrix to get identity matrix
if (not singular matrix someMatrix) then ¬
set someMatrix to invert matrix someMatrix
end tell
12 Aug 03
AppleScript Reference