[netcdfgroup] Chunking with nccopy does not seem to work in version 4.6.7

• To: netcdfgroup@xxxxxxxxxxxxxxxx
• Subject: [netcdfgroup] Chunking with nccopy does not seem to work in version 4.6.7
• From: Adriano Fantini <adr.fantini@xxxxxxxxx>
• Date: Thu, 31 Aug 2017 15:03:46 +0200

I've been trying to chunk some files in a way that is more useful for my
workflow.

See this example test netcdf file:
https://drive.google.com/open?id=0BxlZ3Tjj36sNRkgtMVJiNmY3S1k
(60MB, sorry)

It is chunked like so: 1, 280, 330 (time, lat, lon)
I want to chunk it like so: 744, 1, 1 (time, lat, lon)

Using
nccopy -k 4 -d 1 -s -u -w -c  time/744,lat/1,lon/1 input.nc output.nc

Does not seem to work as the output is chunked like so: 149, 56, 66 (time,
lat, lon)

​Why?

Thanks in advance,
Adriano​