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Failed to launch instance: no host to cell mapping

Dashboard returns: Error: Failed to perform requested operation on instance "blah1", the instance has an error status: Please try again later [Error: Host 'ucmpt02' is not mapped to any cell].

Nova conductor log: Failed to compute_task_build_instances: Host 'ucmpt02' is not mapped to any cell

Nova cell-show returns: root@infra01-utility-container-fca5f131:~# nova cell-show cell0 /usr/local/lib/python2.7/dist-packages/novaclient/client.py:278: UserWarning: The 'tenant_id' argument is deprecated in Ocata and its use may result in erro rs in future releases. As 'project_id' is provided, the 'tenant_id' argument will be ignored. warnings.warn(msg) ERROR (HTTPNotImplemented): The requested functionality is not supported. (HTTP 501) (Request-ID: req-6d189da5-7012-4fcb-985b-169f1e0ffbae)

How should I check/config the cell mapping?

Thanks!