[python-users] [netCDF4] Error when saving >2GB NETCDF file >> NetCDF: Operation not allowed in define mode

• To: python-users@xxxxxxxxxxxxxxxx
• Subject: [python-users] [netCDF4] Error when saving >2GB NETCDF file >> NetCDF: Operation not allowed in define mode
• From: Andrew Joros <andrew.joros@xxxxxxxxx>
• Date: Tue, 15 Nov 2016 19:56:06 -0800

Hi all,

I am across this error when trying to write a new NETCDF from subset of a
LARGE NETCDF file :
Traceback (most recent call last):
  File "wrfextract.py", line 204, in <module>
    longitude[:] = lons
  File "netCDF4/_netCDF4.pyx", line 3996, in
netCDF4._netCDF4.Variable.__setitem__ (netCDF4/_netCDF4.c:43637)
  File "netCDF4/_netCDF4.pyx", line 4208, in netCDF4._netCDF4.Variable._put
(netCDF4/_netCDF4.c:45517)
RuntimeError: NetCDF: Operation not allowed in define mode
-bash-4.1$ lt /Input/WRF_AIC/WRFCorn/wrfout*


I googled around online and I have come across discussion about how saving
Netcdf files >2GB is problematic. Haven't found a Python solution though.
I am using the netCDF4 package in Python FYI.

Has anyone come across as solution in Python for this?

Thanks

-anj

• Follow-Ups:
  • Re: [python-users] [netCDF4] Error when saving >2GB NETCDF file >> NetCDF: Operation not allowed in define mode
    • From: Ryan May