Hi Peter, I made some progress on the model, I had done a terrible job with the trim feature and as a result, a lot of very small offcuts of surface area were floating about within the model ( I #m guessing this is why you had a difficult time trying to analyse the mesh when you a checked my models a couple of days ago.


I have taken my time with the build this time and the surface/geometry are much better than before. I can get every thing to mesh and have defined the boundary conditions. 


However now I cant run the solver. I get the error message "A general failure occurred during the solution process".  I think that its failing with the geometry Could my issue be because I have to take a different approach now that I have surfaces as opposed to solids (do I need to define shell elements within the model).


I have attached the file if you are able to have a look.