The ArcGIS 10.3 release includes the new Space Time Pattern Mining toolbox for analyzing data distributions and patterns in the context of both space and time in ArcMap and Pro. Unfortunately this initial release contains a substantial logic flaw in the Create Space Time Cube tool which makes the results from the Emerging Hot Spot Analysis tool unreliable. We have corrected this problem in ArcMap 10.3.1 and Pro 1.1 and are providing the patches below for your immediate use. Regrettably you must rerun all of your previous analyses using the provided fix. Internally we have enhanced our validation strategies to ensure this is not a recurring error.