I/O Error에는 다음과 같은 정의만 있는데..
번호를 착각하신 것은 아닌지요??
해당 번호는 사용하지 않는 번호대인 것 같습니다..
소스나 다른 자료를 주시면 더 조사해보겠습니다..

Run Time 에러 중에서도 IO에러 말고 Fatal Error 부분은..
200번 부터 시작이네요..

또한 IO Error가 정의되어야할 System Unit에도 해당 에러는 정의되어 있지 않습니다..
아래 번호들은 확인해 보니 당연히 사용되고 있더군요..


Voice of Delphi, 류..

----------------------

Number    Name    Description

100    Disk read error   
         Reported by Read on a typed file if you attempt to read past the end of the file.
101    Disk write error   
         Reported by CloseFile, Write, WriteIn, or Flush if the disk becomes full.
102    File not assigned   
         Reported by Reset, Rewrite, Append, Rename, or Eraseif the file variable has not been assigned a name through a call to Assign or AssignFile.
103    File not open   
         Reported by CloseFile, Read Write, Seek, Eof, FilePos, FileSize, Flush, BlockRead, or BlockWrite if the file is not open.

104    File not open for input   
         Reported by Read, Readln, Eof, Eoln, SeekEof, or SeekEoln on a text file if the file is not open for input.
105    File not open for output   
         Reported by Write or Writeln on a text file if you do not generate a Console application.
106    Invalid numeric format   
         Reported by Read or Readln if a numeric value read from a text file does not conform to the proper numeric format.