Array Thanks for your answer!nCAR error:n--> Could this be due to the greyed-out Mesh Interface options and the fact that I would need to define the interface there? Any ideas on how I can fix that?.If you have two fluid zones check they're both fluid and one isn't solid due to the import.n--> In the Cell Zone Conditions, both zones are defined as fluids. So that should not be the problem.nKind regardsn