The window dimensions that are specified in the WITH clause of this OPEN WINDOW statement conflict with the size of the screen. The entire window cannot be displayed, so the statement is not executed. If the WITH clause specifies dimensions, you can use smaller ones; if it specifies a form, the SCREEN statement in the form specification sets the dimensions. Alternatively, you might be able to get the window into the screen by changing the origin that is provided in the AT clause. 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). Screen dimensions that are 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.