Peter,

Thanks for your help.
I'm not sure to understand the musical reality of the rule. That means a 2-bar pattern can't be played on bars# 2, 4, etc , since it need to start just after a part marker.
Adding a part marker did the trick, but it adds a fill pattern for the bar just before the part marker, and in most casess, the fill pattern is not wanted...
In my progression |C|F| |G7|, I don't need to get a fill during the 1st bar (C chord)...The way to go on should be to be able to put a part marker and to decide to activate or not the fill...That would a 'pseudo part marker'.


Reach for excellence