While not sure what the function (within for-loop) is doing, may I suggest that the Array Size of the Array (DBL) input to the for-loop (with auto-indexing enabled) is taken and wire to the input of "-1" instead of using the numerical value '80'.
This way, it can be sure that the for-loop is running to the size of the input array.
PS1: when an array is wired to a for-loop with indexing enabled, wiring an number to N is not necessary.
PS2: error may occur should the input array size is not equal to i.e. 80
