>ncdump file.nc > file.cdl This should work. The "access denied" means one of the following: 1. the ncdump program was not marked as an executable program 2. the wrong ncdump is being used; try specifying the absolute path (e.g. c:/.../ncdump) 3. file.nc is not readable by you. 4. file.cdl exists and is not writable, or some containing directory is not writeable by you. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: KPE-603099 Department: Support netCDF Priority: Normal Status: Closed