Progress. So, I ran this under centos 7 using Virtualbox. It failed in the way you have seen. One thing I noticed that differed between centos and cygwin was the version of libcurl being used. The one that failed is using a very old (7.29) version of libcurl, while cygwin is using a much later version (7.45). Can you check what version of curl you are using (try 'curl --version')? =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: HAW-868287 Department: Support netCDF Priority: Normal Status: Open =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.