Phar Lap err 35

Could some one tell me what: Phar Lap err 35: The 386 chip is
currently executing in virtual 8086 mode under the control of another
program. You must turn off this other program in order to use
386|DOS-Extender to run in protected mode. ...

I'm attempting to make an old 486-33 run ver 11 Acad, Dos 6.22 - for
a friend.
It ran before on this same pc and I know of no programs running. How
or where can I check?
Is there some sort of patch available? I'm using all the old setups
and bat files from 15 years ago.
Did a google and found nothing.

Regards,
JL

 

Go here and do a search for your error ...
http://discussion.autodesk.com/forum.jspa?forumID=15

 

Thanks Chip,
This is a valuable link - - but it deals with ver 12 and later. I
have 11. Found a couple of hints that may be worth testing.

The strange thing is that it worked 10 years ago - when the soldered
in CMOS battery died. I have now overcome this hurdle with a phone
battery, grinding and alligator clips <grin>.

jl