Ok, found cause:
Renaming function in game state from “GetLivingGoblinsCount” to “Getlivinggoblinscount” solved issue.
There seems to be a problem with automatic “readability” feature. Camel case function name gets modified to have spaces in between - this seems to be very error prone.
I’m going to avoid camel case / spaces / underscores in Blueprints from now on.
Oh, I’m using 4.5.1 by way 