This is the second time I've seen a perfectly relevant question closed as "off-topic":
Here's another one that was closed for some time but was finally reopened:
The first one is a practical, answerable, specific question about the behaviour of a software algorithm; it seems to fit the FAQ perfectly. Perhaps the second question isn't reasonably scoped (Stephen Canon still gave a very good, if high-level, answer that points the asker in all of the right directions), but it's certainly not off-topic.
Why do people keep doing this?