Reg : window.py

[sumitstop]

"global name 'midn' is not defined window.py"

It appears when we try to use windows other than the five windows described at the bottom of the window.py (because they are not using midn)

I tried to search on community and found following two links but both are unanswered

http://gnuradio.4.n7.nabble.com/window-code-td7166.html
http://gnuradio.4.n7.nabble.com/about-signal-process-window-design-td10329.html

Need some clarification