RGEM was never showing an inch of ice for the upstate, lol.
Whatever source you guys were using for those RGEM maps was showing ice accrual based of a stock 1 to 1 ratio of rain to ice if the surface temp was < 32.
Greenville did get over .75 inches of liquid with temps less than 32 degree's. Problem is the temp was 31.5 to 32 during that time with torrential downpours, so only a light glaze was realized.
So in summary, the Rgem nailed this storm, but your ability to read it's modeled output failed. #RgemFTW, lol