Thanks Stuart,
I have sent you an email about this
and by the way it seems that I don't have this problem with the 6.4 beta !

Best regards from France
jc

Hello Everyone, At least with Windows Seven 64 bit on both different PC the software crashed all time by doing the following : two channels or more activate low pass filtering on more than one channel I can re create this every time with my 4224 oscilloscope Very annoying as I often need low pass fi...