Interaction List Problems

Trying to understand how to use this list. Started out with the Visc sample. Added a vortex to the list and then the liquid sim stopped generating and the cylinder on the floor did not interact. Any ideas? The sim is perfect if no interaction is added.

by default the list is exclude list, the objects in it do not interact wit the sim. you can change the meaning to include list, then you have to add the objects to enable the interaction

I think this list is not remembered when a scene is reloaded.

what you mean? it is kept in the scene like the other parameters.