Desperately hoping for a WOW THAT'S SO EASY resolution for this weirdness.  I have inherited corrupted schematic drawings.  Part of the corruption is that all the circles in my terminal and relay blocking have been broken.  What's left is hundreds of polyline segments.  I need to get them back to being circles. Hoping for a SO EASY solution, but any help will be much appreciated.  

Sounds like a job for a custom lisp routine.  Maybe Kent Cooper will have an answer for you as he dabbles in the dark arts.  I think he may have even submitted a similar sounding lisp routine to Cadalyst back in 2011.  Not sure it would work in your situation but Kent would be able to tell you for sure.
John Connor2016-03-04 17:14:46

Try the Pol2Cir utility from the Download section.

[QUOTE=John Connor]....  Maybe Kent Cooper will have an answer for you ....  I think he may have even submitted a similar sounding lisp routine to Cadalyst back in 2011.  ....
[/QUOTE]
I do have such a routine on the Cadalyst CAD Tips website, at http://cadtips.cadalyst.com/curved-objects/circle-polyline-and-polyline-circle.