What do you mean by retaining the shaft and the impeller? Does that mean I should be doing a volume extraction and then meshing that, or that in the Fluent Mesher I should set that the model contains only fluid domains, which is the setting I have been using.nnI just tried upgrading the rendering, but unfortunately it didn't seem to make much of a difference. I still get this error when I go to mesh the model even though no contacts or coincident topology appear in SpaceClaim when I try to use the Share or Forced Share functionsnn