I got this error: printtarg: Error - Internal - half edges don't match when I issued: targen.exe -v -d2 -G -e0 -B0 -s0 -g0 -m0 -b0 -A0 -f210 temp printtarg -v -iCM -h -T600 -pA4 -S temp I started to play with the settings and figured out that the error is caused by the -h switch. The cht generator probably doesn't take -h into account. Is this a bug or a feature? I can't find a reason and I don't like it.