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Let me step in (Dennis Heimbigner, Unidata). If you stick the relevant opendap url into a web browser with a .das at the end, does it work? Also, is there a URL I can access as an external user? Part of the problem is that the translation of netcdf UNLIMITEd into opendap is not part of any standard; it is just historical conventions. Since opendap is intended to translate into netcdf-3 (classic), the unlimited dimension is only supported in the first dimension of an array. There is information in the output of the .das request above about unlimited dimensions, so I need to see that output. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: CDL-298835 Department: Support THREDDS Priority: Normal Status: Closed