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Hi Matt, > I'm trying to use ncdump to read a WRF output file, > but am getting the following error: "***ncdump: > ncopen failed on <file name>". I'm not sure what the > problem is since I can use ncdump to open sample > netCDF files that I download from UCAR's website. > Any idea what's up? I need more information about the problem. What version of ncdump? Look at the last line of output from running ncdump --version. If there is no version listed, it's a very old and unsupported ncdump, so you may need to upgrade. What platform are you running ncdump on? If it's an old version of Windows, the port you have may have been created by a third party before we started officially supporting building the netCDF library and utilities from source on Windows. We also now support binary downloads of netCDF for Windows. Can you run a different program than ncdump on the same file from the same directory? For example, do you get an error message from running "cat <file name>" ? Can you make the WRF output file available? --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: OWN-203547 Department: Support netCDF Priority: Normal Status: Closed