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Simon, I don't seem to see the problem you're reporting, but I'm also using our latest, greatest, 4.4.2 version. It's possible that the issue you are seeing is a bug that has been fixed, but there is also a good chance that your catalog has a problem. Here is the catalog that I used just now: <?xml version="1.0" encoding="UTF-8"?> <catalog name="THREDDS Server Default Catalog : You must change this to fit your server!" xmlns="http://www.unidata.ucar.edu/namespaces/thredds/InvCatalog/v1.0" xmlns:xlink="http://www.w3.org/1999/xlink"> <service name="all" base="" serviceType="compound"> <service name="odap" serviceType="OpenDAP" base="/thredds/dodsC/" /> <service name="http" serviceType="HTTPServer" base="/thredds/fileServer/" /> <service name="ncss" serviceType="NetcdfSubset" base="/thredds/ncss/" /> </service> <datasetScan name="CHESS model precip" ID="ncsstest" path="acuk" location="/Z:/testdata/support/WUZ-932114"> <metadata inherited="true"> <serviceName>all</serviceName> <dataType>Grid</dataType> </metadata> <filter> <include wildcard="*.nc"/> </filter> </datasetScan> </catalog> Perhaps you could try this simple version to see if the error persists. In the meantime, if you send me your catalog, I will take a look at it. Cheers, Lansing Ticket Details =================== Ticket ID: WUZ-932114 Department: Support THREDDS Priority: Low Status: Open