Offset Contour too Large

I haven't experienced my contour offset 'jumping' in too large increments.....BUT

my contour offset tool is not working like it used to.

Only rarely would I receive the message 'contour offset too large' when offsetting a bezier curve .025"

Whenever this would happen I would then reduce my nodes or convert them to cusp or smooth. This would almost always fix the 'countour offset too large' problem.

I've reset Coreldraw to factory default but still have this problem with certain lines.

All of my software is up to date.

CorelDraw X5

27" iMac, Bootcamp, Windows 7

Any help would be greatly appreciated!

Thanks in advance,