NCO/pynco: ncks command unable to find/move file, file is present
Solution 1:
I suggest you attempt the underlying command that failed from the command-line yourself, and report if/how/whether it needs to be modified to succeed, i.e., try this
move C:/home/data/nclimgrid/201801_nclimgrid_dsd/work/lowres_nclimgrid_tavg_slice00.nc.pid11800.ncks.tmp C:/home/data/nclimgrid/201801_nclimgrid_dsd/work/lowres_nclimgrid_tavg_slice00.nc
Also you might try adding the --no_tmp_fl switch to the NCO command, as this could circumvent permissions problems.