NorESM2.0.9 fails to create new case with the multi-driver mode

[lisesg]

Describe the bug
Please provide a clear and concise description of what the bug is.

• NorESM version: 2.0.9
• HPC platform: Betzy
• Compset: NF2000climo
• Resolution: f19_f19
• Error message (if applicable): Traceback (most recent call last):
  File "/cluster/home/lisesg/NorESM/cime/scripts/./create_newcase", line 210, in
  _main_func(doc)
  File "/cluster/home/lisesg/NorESM/cime/scripts/./create_newcase", line 198, in _main_func
  case.create(casename, srcroot, compset, grid, user_mods_dir=user_mods_dir,
  File "/cluster/home/lisesg/NorESM/cime/scripts/Tools/../../scripts/lib/CIME/case/case.py", line 1449, in create
  self.configure(compset_name, grid_name, machine_name=machine_name,
  File "/cluster/home/lisesg/NorESM/cime/scripts/Tools/../../scripts/lib/CIME/case/case.py", line 856, in configure
  if multi_driver and ninst>1:
  TypeError: '>' not supported between instances of 'str' and 'int'

To Reproduce
Steps to reproduce the behavior:

1. create_newcase --case <path-to-case-folder> --multi-driver --ninst 11 --compset NF2000climo --machine betzy --res f19_f19 --project <some-computing-project> --run-unsupported

Solution

The problem is resolved by changing the if test on line 856 in case.py from if multi_driver and ninst>1: to if multi_driver and int(ninst)>1:.

According to @gold2718, the problem is solved for the newer versions of CIME in cime6.0.13, but a permanent fix is need for NorESM2.

This bug is also reported in an issue in the NorESM repo, issue 648.