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Ansley- There are two issues. First, there is your stride problem. I have a fix and am testing it now. Second, and unconnected to the stride problem. There is an issue with how ferret handles projections on grids. [I should note that corresponding requests on TDS give similar problematic results] Consider the following url with constraint: http://cwcgom.aoml.noaa.gov/thredds/dodsC/AVHRRSST/SST.nc.dds?sst.sst If I put this in a browser, I get back this: Dataset { Float32 sst[time = 133][y = 2951][x = 3657]; } AVHRRSST/SST.nc; However, the DAP2 spec was changed a couple of years ago so that the correct result should be this: Dataset { Structure { Float32 sst[time = 133][y = 2951][x = 3657]; } sst; } AVHRRSST/SST.nc; The reason for the change was to remove an ambiguity because not including the Structure{} lost scoping information. I should note that the following url http://cwcgom.aoml.noaa.gov/thredds/dodsC/AVHRRSST/SST.nc.dds?sst.sst,sst.time properly returns this: Dataset { Structure { Float32 sst[time = 133][y = 2951][x = 3657]; Float64 time[time = 133]; } sst; } AVHRRSST/SST.nc; However, there is a true error for this url (different from above): http://ferret.pmel.noaa.gov/geoide/dodsC/PSDgriddedData/ncep.reanalysis.dailyavgs/surface/slp_aggregated.dds?slp.slp,slp.lon It returns this: Dataset { Grid { ARRAY: Int16 slp[time = 23322][lat = 73][lon = 144]; MAPS: Float32 lon[lon = 144]; } slp; } PSDgriddedData%2fncep%2ereanalysis%2edailyavgs%2fsurface%2fslp_aggregated; This is a error because it is a malformed Grid rather than a Structure. It only seems to happen when the last map is in the projection set. I should note that if I do this corresponding request with the first url: http://cwcgom.aoml.noaa.gov/thredds/dodsC/AVHRRSST/SST.nc.dds?sst.sst,sst.x it works ok; no idea why. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: QTC-832048 Department: Support netCDF Priority: Normal Status: Closed