Sorry! I meant c:\windows\system32. Once the DLL is there you may need to tell your development environment how to see it or use it. At this point you need to look at your fortran development environment and see how it want's you to use a DLL. The DLL is a library of netCDF functions that you will call from your fortran program. Your fortran compiler has to be told that you are using this library, and how that is done depends on the compiler. Thanks! Ed Ticket Details =================== Ticket ID: GCL-221817 Department: Support netCDF Priority: Normal Status: Closed