Hi Ben, My first attempt to provide such an example also produced unexpected zeros in the array to be written. You may have found a bug, but I will have to do more work to verify this and determine whether it's just in the F77 interface or in the core C library. I also have to see why our testing did not reveal this problem. I'll send a follow-up when I know more. But thanks very much for sending the bug report ... --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: KJN-301947 Department: Support netCDF Priority: Normal Status: Closed