Specifies that the system is not to wait until the subprocess
    is completed before allowing more commands to be entered. This
    qualifier allows you to input new SDA commands while the spawned
    subprocess is running. If you specify /NOWAIT, use /OUTPUT to
    direct the output of the subprocess to a file to prevent more
    than one process from simultaneously using your terminal.

    The default behavior is that the system waits until the
    subprocess is completed before allowing more SDA commands to
    be entered.