# Cylc 8 with LFRic Rose stem and Python issues **URL:** \ **Category:** Cylc 8 Migration\ **Created:** [September 7, 2022, 1:57pm UTC](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stem-and-python-issues/532 "2022-09-07T13:57:45Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![astirnem](https://avatars.discourse-cdn.com/v4/letter/a/258eb7/32.png) [@astirnem](https://cylc.discourse.group/u/astirnem)\ **Post date:** [September 7, 2022, 1:57pm UTC](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stem-and-python-issues/532/1 "2022-09-07T13:57:45Z")
I am trying to get the LFRic “make test-suite” command in lfric\_atm to work. After eliminating the arguments --name, --config, --no-gcontrol, --new, --define-suite (used by LFRic but no longer supported by rose stem) from the LFRic build configuration, the command boils down to rose stem -n=meta\_diag-lfric\_atm-meto-spice-developer --source=rose-stem --opt-conf-key=meto-spice --verbosity=1 --group=developer The produces the following error: pkg\_resources.[ContextualVersionConflict?](https://code.metoffice.gov.uk/trac/lfric/wiki/ContextualVersionConflict): (setuptools 39.0.1 (/net/project/extrasoftware/packages.rhel7/python/3.7.0/site/lib/python3.7/site-packages), Requirement.parse(‘setuptools\>=49’), {‘cylc-flow’}) This message doesn’t mean much to me. Here are the relevant versions my session is using: $ python --version Python 3.7.0 (default, Oct 9 2018, 10:31:47) [GCC 7.3.0] $ cylc version 8.0.0 $ rose version rose 2.0.0 I would appreciate any advice. Cheers, Andreas ---
**Author:** ![oliver.sanders](https://yyz2.discourse-cdn.com/free1/user_avatar/cylc.discourse.group/oliver.sanders/32/110_2.png) [@oliver.sanders](https://cylc.discourse.group/u/oliver.sanders)\ **Post date:** [September 7, 2022, 4:32pm UTC](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stem-and-python-issues/532/2 "2022-09-07T16:32:39Z")
Hello, This error is happening because you have some Python 3.7 files in your `PYTHONPATH` which are messing with the Cylc environment. To fix, try running Cylc in a clean environment. ```auto # NOTE: Met Office specific module purge ``` Unfortunately there isn’t much we can do to improve this error message as the Cylc wasn’t able to load. The LFric rose-stem suites require a few small changes to make them Cylc 8 compatible. Andrew C has a branch where he’s made some progress on this. For general info, here are the changes made so far: - rose-stem options - `--name` → `--workflow-name` - `--define-suite` → `-S` (this is a Rose bug, we will reinstate the `--define-suite` argument soon) - `--config ` → `` (now a positional argument). - Remove `--new` & `--no-gcontrol`. - cylc play - The `rose stem` command now only installs the workflow. - Add `cylc play ` after the `rose stem` command to make it run. - cylc gscan - This GUI has been replaced by the web GUI (`cylc gui`). - For a light-weight CLI alternative try `cylc scan`. - Jinja2 - Globals: - Apply this one-line patch to fix a Jinja2 issue: [Cylc 8 with LFRic Rose stems and Jinja2 issues - #4 by oliver.sanders](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stems-and-jinja2-issues/525/4) - variables - The `disabled` variable (used for xc40 configs) is invalid. - I don’t understand how this worked at Cylc 7. - Quoting the value suppresses the error: `...=disabled` → `...='disabled'`, - ROSE\_ORIG\_HOST - Tasks for the SPICE platform had `[remote]host` set to `ROSE_ORIG_HOST`. - This tells Cylc to perform an unnecessary SSH. This doesn’t work at Cylc 8. - Easy fix, change `ROSE_ORIG_HOST` → `'localhost'` for SPICE sections in a Jinja2 file somewhere. A long list but it boils down to a small diff. With that the rose-stem suites tested so far validate and run under Cylc 8. ---
**Author:** ![astirnem](https://avatars.discourse-cdn.com/v4/letter/a/258eb7/32.png) [@astirnem](https://cylc.discourse.group/u/astirnem)\ **Post date:** [September 8, 2022, 7:33am UTC](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stem-and-python-issues/532/3 "2022-09-08T07:33:26Z")
Thank you for your fast and detailed response. This is very useful. Unfortunately, the module purge doesn’t solve our problem - I suspect this is because after module purge, we are left with python 2.7.5. In any case, I agree that this is a problem for the LFRic team to solve. ---
**Author:** ![wxtim](https://yyz2.discourse-cdn.com/free1/user_avatar/cylc.discourse.group/wxtim/32/151_2.png) [@wxtim](https://cylc.discourse.group/u/wxtim)\ **Post date:** [September 8, 2022, 8:32am UTC](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stem-and-python-issues/532/4 "2022-09-08T08:32:25Z")
My own comments, in addition to Oliver’s: - `-n` is the short form of both `--workflow-name` and `--name`, so it works on both versions. - `--new` doesn’t make as much sense at Cylc 8 because rose stem wraps `cylc install`, and Cylc install defaults to installing workflows in `~/cylc-run//run` where x increments every time you run it. The nearest equivalent would be `cylc clean /run`, then running rose-stem. - You use `cylc reinstall` if you want to re-install a rose stem workflow. ---
**Author:** ![oliver.sanders](https://yyz2.discourse-cdn.com/free1/user_avatar/cylc.discourse.group/oliver.sanders/32/110_2.png) [@oliver.sanders](https://cylc.discourse.group/u/oliver.sanders)\ **Post date:** [September 8, 2022, 8:57am UTC](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stem-and-python-issues/532/5 "2022-09-08T08:57:48Z")
> [@astirnem](#): > > Unfortunately, the module purge doesn’t solve our problem - I suspect this is because after module purge, we are left with python 2.7.5. In any case, I agree that this is a problem for the LFRic team to solve. There’s probably something left in your `PYTHONPATH` which is breaking the stack. Rose is installed in an isolated environment with it’s own Python stack but `PYTHONPATH` can still interfere with it. ---
**Author:** ![astirnem](https://avatars.discourse-cdn.com/v4/letter/a/258eb7/32.png) [@astirnem](https://cylc.discourse.group/u/astirnem)\ **Post date:** [September 8, 2022, 9:36am UTC](https://cylc.discourse.group/t/cylc-8-with-lfric-rose-stem-and-python-issues/532/6 "2022-09-08T09:36:21Z")
Spot on - clearing PYTHONPATH fixed the problem. Thank you very much!