Hi Ben,
> I'm guessing this is not possible but I thought I would ask just in case
> there is something I missed.
> Is it possible to change a dimension from a fixed length dimension to a
> record or unlimited dimension in place without having to rewrite the
> entire file.
No, it requires rewriting.
> In my case I have a bunch of 2D (lat, lon) or 3D (lon,lat,lev) plus time
> netcdf 4 files where time is the last dimension (1 time per file) that I
> want to concatenate with the nco utility. The files were created with
> time a fixed dimension of length one and are large and nco seems to be
> making a copy of the whole file when converting the time to an unlimited
> dimension. Looking at the API it doesn't seem it can be done without
> making a new file.
Right, unfortunately.
--Russ
