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Oh, it's one of those deals, where the client doesn't know what he's doing. Yeah, I deal with the same thing on a daily basis. You could try Lee Mac's "Ellipse to Arc" lisp routine. http://www.lee-mac.com/ellipsetoarc.html

Well, I don't know of any way to do that with standard Autocad commands. You could try asking in the Lisp section to see if anyone has a custom routine, but I'm not sure if one could be written for this situation since every ellipse will be a different size and shape. Just out of curiosity, why did you draw them as ellipses to begin with? Especially the circles. Those are two ellipses joined together. You should have just drawn a simple circle.

There is no command to automatically change them. You will have to redraw them Using the ARC command and the CIRCLE command.

I don't have Max installed anymore, so I can't import your file, but I did open your CAD file and I see that a lot of your arcs are actually ellipses. Are those the ones that are deleted when you import? If so, change the ellipses to arcs or full circles and that should solve the problem.

(setq B (getstring (strcat "\n Bar Spacing <" A "> "))) And Then (if (= B "") (setq B A))

you can use excel "CONCATENATE" function to with chainage as X axis length and Pipe Elevation as Y axis. then Copy and use PL command in cad and paste it all the ucs needs to be aligned too 0,0 at your starting on profile. Maybe this will be difficult to understand.. or you can try a lisp i am attaching. I have modified it a bit for my needs, try it.. Nline - As We Type.LSP