Hi Dan: Do you want to try our "release candidate" that should fix these problems? If so, I would be grateful for any feedback on it. We probably wont do an official release for another week or so. Its at ftp://ftp.unidata.ucar.edu/pub/thredds/3.9/thredds.war. The NcML docs have been updated to reflect the changes i needed to make: http://www.unidata.ucar.edu/software/netcdf/ncml/v2.2/Aggregation.html see "Defining coordinates on a JoinNew aggregation" section. thanks Ticket Details =================== Ticket ID: NCD-931813 Department: Support THREDDS Priority: Normal Status: Open