Hi Erik, Sorry, but we haven't gotten a copy of Leopard yet to test with, and it looks like we won't have it until next week. Have you tried running configure without the "--enable-64bit" option? Just because Leopard supports a 64-bit model doesn't mean all software has to be compiled to use it. The netCDF library still supports creating and reading large (64-bit offset) files even when compiled as a 32-bit library. Please let us know what happens if you just run configure on Leopard without the "--enable-64bit" option. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: TZL-284586 Department: Support netCDF Priority: Normal Status: Closed