Where's mah Success Path Analyzer data?

This is a similar but different question from the other two I read -- I made and approved an RCM, then batch updated All The Leads into the new RCM, but Group Reports -> Analyzers -> SPA just goes "No data was found in the specified Time Frame" (Time Frame: All Time, RCM = Approved RCM) so I refreshed a few thousand times to be sure. Am I doing something bad or does this RCM stuff need a day to catch up? The Success Path report worked before on a different RCM, so I can't tell if it's bug/feature/user-assumption.