Luca Pataracchia

You might try increasing your max substeps on your flip solver. Having fast collision objects in a flip sim will sometimes result in volume loss. More substeps can help with this. In your case it could be because the water is moving quickly when it hits the collision object.

I usually define a function in my .py file and put the code I want to run in that function. Then I do the following:

1. Start hython
2. soure my_module
3. my_module.my_function()

When I'm on Linux I use the shell. On windows I use cygwin for my shell. I've not tried this with the power shell

You might want to do it in Tops instead of rops. Tops(PDG) will allow surfacing to execute immediately as soon as the frames from the Sim have finished. Rops while still a valid method is antiquated.