Hi,
Galv advised me to use this Rpg maker Vx script so it could help.
http://pastebin.com/rW9qkbxTHe also told me to replace the last line with this
load_data("Data/Scripts.rvdata2").each_with_index {|s, i| ScriptNames[i] = s[1] }
The features of the script do not work 100%, only the text file report seems to work.
But I think this script if updated, may help other people with viewport issues like mine.
So in the end of my story, I updated the weather script and I have not met yet again the crash.
I guess my problem was really from it, I cross finger that's the case. Only the futur will tell.
Sorry for my bad English.
Good night.