Hi Craig, > Description of problem: There was an error loading the data: > Error creating data source:netcdf.grid with: > http://silktree.cs.indiana.edu:25000/thredds/catalog/N/dc/projects/lead/ldm/pub/other/RUC/13km/catalog.html?dataset=/RUC/13km/0911413000014.grib > Grid data source failed making data set: > http://silktree.cs.indiana.edu:25000/thredds/catalog/N/dc/projects/lead/ldm/pub/other/RUC/13km/catalog.html?dataset=/RUC/13km/0911413000014.grib > Server does not support byte Ranges > It looks like the URL you tried to load is the URL to the HTML view of that data set. You should use the opendap URL from the page: http://silktree.cs.indiana.edu:25000/thredds/catalog/N/dc/projects/lead/ldm/pub/other/RUC/13km/catalog.html?dataset=/RUC/13km/0911413000014.grib Or, you can load in the catalog.xml URL into the IDV's catalog chooser and load in the grid from there: http://silktree.cs.indiana.edu:25000/thredds/catalog.xml -Jeff Ticket Details =================== Ticket ID: PNU-535098 Department: Support IDV Priority: Normal Status: Closed