Mohammadpour- If --enable-dap-remote-tests is set in your configure flags, then the tests will attempt to communicate with some DAP data servers. Sometimes, these servers are inaccessible. So sometimes, if you just run make check a second time, everything will work. There are two other things you can do. 1. If you do not need DAP access, then add --disable-dap to your set of configure flags; that "./configure ..... --disable-dap" 2. If you want dap access then add the --disable-dap-remote-tests to your set of ./configure flags. =Dennis Heimbigner Unidata =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: YEM-450155 Department: Support netCDF Priority: Normal Status: Open