Does IRIS really not mention Cache in its $ZVERSION string?
Documentation (http://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?...) states that it looks like:
IRIS for Windows (x86-64) 2018.1 (Build 487U) Tue Dec 26 2017 22:47:10 EST
Does it really true, or just a documentation typo?