Thanks a lot Kal_Lam, for your feedback yesterday ! :
Just one thing : it seems your answer is focussing on the «if» component, while the part which remains problematic for me is the < X1-X244 >. … I write this X as a replacement for C and E.
So, my question focusses on the syntax necessary to express/describe < X1 to X244 > as an array, because that would shorten the code a lot. Do you get my point ?