Review the DISPLAY...AT statement. Make sure that the position numbers are in the correct order (row number first, then column) and that they make sense for the current terminal or window. The dimensions of the terminal for UNIX systems are determined when the program starts by reading termcap information (or terminfo information, depending on the value of the INFORMIXTERM environment variable). A screen location that is correct for one user of the program might not be correct for all. On DOS systems, the window size is always 24 lines by 80 characters.