Hi, I have added a feature to FieldConvert which allows you to specify a serial run that acts as if it is a single partition of a parallel run. This is hopefully useful for processing large files for example when interpolating one mesh to another. I have put some instructions under http://www.nektar.info/wiki/3.4.1/UserGuide/Tutorial/FieldConvert Cheers, Spencer. Spencer Sherwin Professor of Computational Fluid Mechanics, Department of Aeronautics, Imperial College London South Kensington Campus London SW7 2AZ s.sherwin@imperial.ac.uk +44 (0) 20 759 45052