I was having issues with trying to use Knockout back in '11 and Mark T. responded with the following to my cry for help - hopefully it will shed some more light on how to make Knockout work best:
"The problem is that the color used to draw the framing (Lt Magenta) is
assigned to a higher Pen Assignment number in the Pen Table (8) than
the circle inside the symbol which has the KnockOut enabled (White,
Pen 4).
For this to work with Pen Sort on, you'll need to adjust the
assignments so that the color of the KnockOut entity (White) is
assigned to a Pen Assignment number that is lower than the detail
circle (Lt Green), and detail text (Yellow), but higher than the
framing color (Lt Magenta). This will result in a print order of
framing, then KnockOut, then detail circle and text.
Another option would be to turn Pen Sort off. This will cause DataCAD
to print using display order instead of Pen Assignment order."
Highest Regards,
Alan T. Hendry, RA
Intel i7-12700F (2.10 GHz) Desktop, 16GB RAM, 1TB SSD, Win 11 Home 64-bit, DC 23 w/ latest beta
Intel i7-10750H (2.6GHz) Laptop, 16GB RAM, 1.5TB HD, Win 11 Home 64-Bit, w/ DC 22, 23 & latest beta