-Thanks, yes my first rounds of persistent data was not what I wanted introduced into my analysis data. I manged to figure it out by making sure to using the DeleteExtent method on my persistent class. Then feeding new data into my class, compiling  the object and then rebuilding the cube. 

-Do ##class(PO.PersistentObject).%DeleteExtent(),!

-compile

- set status = ##class(%DeepSee.Utils).%BuildCube("MyCube.Cube")