Hello,
sorry for my late answer , I was busy on other matter :-)
I tested your patch, etc.
The patch you propose wokrs fine :-) SO it is not coming from my installation.. grrr! I would have like that it was due to my installation.
So I decided to look at the code (as you explained) and changed it, I found a solution.
It is wokring now but a friend of mine who tested it on his computer told me that ableton live cashes everytime he save a presets (clicking on the little dots in the presets make ableton live crashes).
I am fed up!
I will send a crash report to ableton live and cycling... let'see.
thanks again, you advice helped me a lot :-)
I keep you inform.