Greetings! My organization is an atmospheric data provider and we are implementing a THREDDS Data Server, which, for gathering user metrics, is password-protected. I have successfully used your AIRS example http://www.exelisvis.com/...-support-in-IDL.aspx in our version (8.2.1) if IDL. However, I do not seem to be able to access my own TDS OPeNDAP service with a supplied user/pass syntax as url = 'http://USERNAME:PASSWORD@server.domai...…' I have successfully employed this syntax with other OPeNDAP clients - including the netCDF (v4.2) ncdump utility - with the following exceptions Matlab: http://www.mathworks.com/help/matlab/... GrADS client http://www.iges.org/grads/ (Please note that I am in discussions with the GrADS client developers and they are testing the difference in netCDF version as a possible source of the problem. GrADS is using netCDF v4.1.2) Can IDL handle password protected OPeNDAP access. I don’t see any mention of OPeNDAP at all in the Exelis forums and hoped that this would be a place I could get some answers. Many thanks! -kevin.