If any of you run into this, I finally got Map 5 to run again by reloading the os (win2k) back onto itself. It did mess up a couple other applications which I had to uninstall and reinstall.
I run a w2k box, have Autodesk map 5.0 running on it for a year, last week while trying to open a drawing file emailed to me, I got the above error. I have tried all the fixes posted on the autodesk support site,the Mdac fix does not work, the regserv32 fix, ran but does not resolve the issue...