I am debugging my code and have corrected as much as I can. Still there are these two pesky messages about "Unknown pattern name" which continue to show up each time the program is run. In the whole program there are only two times which I invoke the hatch command and both times it works correctly. I have double checked spelling, syntax, etc... and made darn sure the "AR-CONC" hatch is present and accounted for in my acad.pat file. And the hatch commands work perfect. Still each time the program runs, it prints "Unknown pattern name" twice before exiting cleanly.
Is this something I just have to live with?