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[netcdfgroup] ncap2 cannot find file

Hello all,

I am trying to add two variables and put the result in a third one with
ncap2, and I have this strange error:

$ ncap2 -L 6 -4 -h -A -s
'co2_flux_natural=bio_flux_opt+fire_flux_imp+ocn_flux_opt' guineapig.nc
ERROR: nco__open() unable to open file "guineapig.nc"
nco_err_exit(): ERROR Short NCO-generated message (usually name of
function that triggered error): nco__open()
nco_err_exit(): ERROR Error code is -101. Translation into English with
nc_strerror(-101) is "NetCDF: HDF error"
nco_err_exit(): ERROR NCO will now exit with system call exit(EXIT_FAILURE)

Which is extremely strange, because the file guineapig.nc *does* exist
in the current folder:

$ ls -l guineapig.nc
-rw-r--r-- 1 i i 4862322 Mar 24 16:28 guineapig.nc

What is more, I can use ncap2 to perform the exact same operation on
some other files without a problem. Which leaves me very confused as to
why ncap2 fails and tells me that this file does not exist, when it
clearly does and is writable. The guineapig is attached. Anyone has any
idea?

Thanks,

Sourish

Attachment: guineapig.nc
Description: Cdf file

Attachment: signature.asc
Description: OpenPGP digital signature