I have install mailman-core using pip when I call up "mailman info" I get the following error can anyone point me to what is wrong.

Traceback (most recent call last): File "/usr/local/bin/mailman", line 11, in <module> sys.exit(main()) File "/usr/local/lib/python3.5/dist-packages/mailman/bin/mailman.py", line 97, in main initialize(config_path) File "/usr/local/lib/python3.5/dist-packages/mailman/core/initialize.py", line 185, in initialize initialize_2(propagate_logs=propagate_logs) File "/usr/local/lib/python3.5/dist-packages/mailman/core/initialize.py", line 156, in initialize_2 config.db = getUtility(IDatabaseFactory, utility_name).create() File "/usr/local/lib/python3.5/dist-packages/mailman/database/factory.py", line 55, in create SchemaManager(database).setup_database() File "/usr/local/lib/python3.5/dist-packages/mailman/database/factory.py", line 96, in setup_database alembic.command.stamp(alembic_cfg, 'head') File "/usr/local/lib/python3.5/dist-packages/alembic/command.py", line 504, in stamp script.run_env() File "/usr/local/lib/python3.5/dist-packages/alembic/script/base.py", line 425, in run_env util.load_python_file(self.dir, 'env.py') File "/usr/local/lib/python3.5/dist-packages/alembic/util/pyfiles.py", line 81, in load_python_file module = load_module_py(module_id, path) File "/usr/local/lib/python3.5/dist-packages/alembic/util/compat.py", line 83, in load_module_py spec.loader.exec_module(module) File "<frozen importlib._bootstrap_external>", line 665, in exec_module File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed File "/usr/local/lib/python3.5/dist-packages/mailman/database/alembic/env.py", line 38, in <module> @public File "/usr/local/lib/python3.5/dist-packages/public/public.py", line 15, in public else sys.modules[thing.__module__].__dict__) KeyError: 'env_py'

-- Richmond Loring rloring@bnl.gov Advanced Systems Engineer