Ok. My next guess is that libnetcdf is not using the new libcurl. I am not sure how to test this: you need to figure out which libnetcdf is being used by matlab and then you need to see what libcurl is being used by libnetcdf. One thing to try is to set the following environment variable (assuming you are on some variant of Linux/Unix). LD_LIBRARY_PATH="PATHTOLIBCURL:${LD_LIBRARY_PATH}" Where PATHTOLIBCURL is something like /usr/local/lib or whereever that new libcurl got installed. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: YMM-994550 Department: Support THREDDS Priority: Normal Status: Closed