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All execute activities that transfer files to and from FEWS should be java activities that don't use a custom jre and check the System.getProperties().get(file) before they fall back to read/write the file on disk. Only XML and NetCDF3 All files can be transferred in memory, except NetCDF4. For NetCDF NetCDF3 files the System.getProperties().get(file) contains a chunked byte array (byte[][]). An empty byte[][] array is set to tell an execute activity to save the nc file to memory as chunked byte array. The diagnostic file is also transferred in memory. Execute activities should always fall back on the files on disk when the System.getProperties().get(file) == null
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