I am trying to sim a 1000 frames of a FEM coral with branches swaying in water currents.
For some reason it freezes at frame 800.
I checked all the DOP nodes, and couldn't find anything obvious.
What am I missing?

Have you tryied adding an output node and exporting the sim? I am a bit confuse that your Dop network did not have any output. Or that there was no file export for your sim in any place? which lead me to guess that you are running this through memory?

If you go into the /out network, you'll see there is a geometry ROP called SoftCoral_A_1_1000
This has the SOP path set to /obj/soft_Coral_A, and outputs to a geometry sequence.
I used this geometry ROP node to output the geometry.