Dear all, By installing TeX from the beginning and changing to new font family, "CFF: Invalid caracter" error was disappeared. I think that there are some problems in some korean fonts But the same file had a little problem in Powerbook G4(OS X 10.4.7). I think that it is not the problem in XeTeX, ConTeXt, but in the configuration in Terminal or in the system. Although I have little knowledge about Unix, I'll try to fix it. Thank you again for all the help. Best regards, Dalyoung