Hello, In my C code, I have: #define message message("Start\n"); When I look at the SRC file, I see: RSEG ?CO?MAIN ?SC_0: DB 'S' ,'t' ,'a' ,'r' ,'t' ,00AH,000H ; message("Start\n"); Why does the C51 version 1.32 keep "Start\n" in the output? Does this also happen to newer version? Thanks, Anh