Hi Gerry, This is the first time I've seen this problem with 3.6.1, though it used to occur on HP-UX using the 3.6.0 version. You don't need flex. Here's the problem and fix: http://www.unidata.ucar.edu/software/netcdf/docs/known_problems.html#ncgen-timestamp --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: JLF-228519 Department: Support netCDF Priority: Normal Status: Closed