Hi Luoyang, In TDS 4.5+, you must specify the content root during startup [1]. Cheers, Christian [1] http://www.unidata.ucar.edu/software/thredds/current/tds/UpgradingTo4.5.html Ticket Details =================== Ticket ID: LDW-408564 Department: Support THREDDS Priority: Normal Status: Closed