I have a bunch of vellum grains going into DOPS, but once inside the DOP network there seems to be a square chunk of grains missing.

Am I just being limited to what will display in DOPs?

Your image is not showing seems you need to upload it again!
BTW, I checked out your file and everything was normal for me!

Hmm, well thank you for checking. I'm not sure what's going on at my end then. I will try to cache the points before they go into DOPs and see if that helps.

Try to increase your grain size and see if it helps.

DOPS is doing something strange whenever my grain size is low enough to create more than 5 million points.
I can see the full number of points outside of the DOP network.

If the grain size is high enough to create more than 5 million points, I get the result shown in the image in my first post.

Strangely, the number of points / prims guide won't display when I'm inside the DOP network.

This seems to be just a display thing and the simulaiton still runs with the correct number of points being output at the DOP Import end of this sim.