Array changes its value without apparent reason

Question

Hi, i have been now trying to solve this problem for two days with no result.
I have a piece of code thats compares the last two elements of a cluster on every position of two arrays, (these are cordinates x,y) so when it finds two sets of coordinates matching, it then sets the fist element of the cluster on that position one of the of the arrays to 0 and the other to 5.
The problem is that when if exits the first FOR loop, it loses the value 0, and recovers the value it had before entering the loop.
The code:
In bpoint 25 it has 6, then in 26 turns to 0
Solved!
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Answer 1

If you put a probe on the boolean going to the case structure selector terminal (with ?), I think you will find that the last value is False.  In that situation the value on that wire tunneling through the False case will appear on the output (at probe 26). You could also put a probe on the wire in the False case - the same location as probe 25, except in the False case.  Highlight execution might be helpful but from looking at the timestamps it might be so slow as to be too annoying to be helpful.
Lynn