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Jason, One additional note is that netCDF record variables have no 4GB size limit, just a limit of 4GB for each record and about 4.18 billion records. So even if you have no use for a record dimension along which to append growing data variables, by just using the record dimension for your variables' most slowly varying dimension, you get around the 4 GB size limit. > ... Are there any modifications that will allow the > model program to create a v3.6 netCDF file that will avoid this > limitation? Although it may be possible to modify the netCDF-3 library to get around this limit on 64-bit platforms, the resulting files would be using a new format that would not be easily portable to 32-bit platforms or readable by existing netCDF software. As Ed has pointed out, we may provide support for such a format in the future, but we can't commit to it yet. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: YTY-788071 Department: Support netCDF Priority: Normal Status: Closed