ZBrushCentral

Post dynamesh / slicecurve divisions not working

I have a mesh that I’ve Dynameshed and done a slice curve on so its 2 chunks. I needed more resolution so I hit divide.

The model claims it is only 800k faces total. But I hid CTRL D or Divide and it eats it really really really hard. Infact i believe it is timing out!!! This normally would have just gone fine. But right now its sitting there with the timer counting up/down for a very long time and I have yet to get it to “stick”

What is going on?

BTW I do not have Dynamesh turned on when i’m doing this.