Hi,
I am migrating a Mailman 2.1 setup to Mailman 3 (Debian Buster).
Most mailing lists can be imported successfully using the import21 subcommand, as described in the docs.
Some mailing lists fail with the following error:
sudo -u list mailman import21 REDACTEDLIST@example.org /var/lib/mailman/lists/REDACTEDLIST/config.pck Traceback (most recent call last): File "/usr/bin/mailman", line 11, in <module> load_entry_point('mailman==3.2.1', 'console_scripts', 'mailman')() File "/usr/lib/python3/dist-packages/click/core.py", line 764, in __call__ return self.main(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 717, in main rv = self.invoke(ctx) File "/usr/lib/python3/dist-packages/mailman/bin/mailman.py", line 69, in invoke return super().invoke(ctx) File "/usr/lib/python3/dist-packages/click/core.py", line 1137, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/usr/lib/python3/dist-packages/click/core.py", line 956, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/lib/python3/dist-packages/click/core.py", line 555, in invoke return callback(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/decorators.py", line 17, in new_func return f(get_current_context(), *args, **kwargs) File "/usr/lib/python3/dist-packages/mailman/commands/cli_import.py", line 64, in import21 pickle_file, encoding='utf-8', errors='ignore') ModuleNotFoundError: No module named 'Mailman'
Note again: most mailing lists of the installation work fine. And this particular pck file is fairly recently modified.
Has this happened before? Any suggestions how to debug this?
Thanks,
Christian