The Window reserves a line at the bottom for a system message line. This may be overlaying the footer of the other window. Try making your subfile window one or two lines bigger than the window underneath.
Try using the WDWTITLE (window title) keyword – this will allow you to put the text you desire in the window frame, either at the top or the bottom – your choice.
Nope this does not work!
Can be solved by using the Window footer as a reference in the Window subfile.