desired width of display_width is not allowed, width is set to
 display_width

    Facility: DEBUG, VMS Debugger

    Explanation: After creating the display pasteboard using the SMG
    routine SMG$CREATE_PASTEBOARD, DEBUG found that the display width
    was not in the range 20-255.

    User Action: Issue the DCL command SHOW TERMINAL and verify that
    the terminal width is correct and in the range 20-255.