I have no idea how to do that, or even what a binary search is. This is probably beyond my capabilities.
A binary search is simple. You take half your CC out and check to see if the problem persists. Whatever the outcome is, you know which half is causing the problem. You keep doing this again and again, eliminating half of what's left every time, until you find the one that's causing the problem.
It would go like this (rounded up) if you had 500 files to sort through:
500
250
125
63
32
16
8
4
2
1 <-- You know this one is the problem.
ETA: Of course, you run into problems when more than one file is causing the same problem, but you can just repeat the procedure over again if that's the case.