HI Asim, If you put all the files into a directory called meanField.chk/ The only thing you then need in this directory is a file called info.xml which tell you which partitions contain which elements. This can be generated from FieldConvert using FieldConvert --nprocs 10 file2.xml file2.fld/Info.xml:info There should also be some details about this in the user-guide in section 5.5.1 (user-guide-4.3.2.pdf). I hope this helps. Spencer. On 16 Nov 2016, at 09:26, Asım Önder <asim.onder@gmail.com<mailto:asim.onder@gmail.com>> wrote: Dear all, Due to memory limitations, often I have to partition large data files using something like FieldConvert --part-only=100 config.xml fields/field_1.chk , and postprocess them piece by piece: FieldConvert -v -m meanstats config_xml/P000000"$p".xml fields/field_1.chk meanFields/meanField_1_p"$p".fld In the case of meanmode module for example, the output is a collection of many small files associated with partitions, which can be analyzed piece by piece. I was wondering if there is a way to merge the outputs back into one piece again like one piece fld file. Any feedback is appreciated. Thanks, Asim _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users Spencer Sherwin McLaren Racing/Royal Academy of Engineering Research Chair, Professor of Computational Fluid Mechanics, Department of Aeronautics, Imperial College London South Kensington Campus London SW7 2AZ s.sherwin@imperial.ac.uk<mailto:s.sherwin@imperial.ac.uk> +44 (0) 20 759 45052