nova list
+--------------------------------------+----------------+--------+------------+-------------+----------+
| ID                                   | Name           | Status | Task State | Power State | Networks |
+--------------------------------------+----------------+--------+------------+-------------+----------+
| 80cbbb7a-dfc8-4b6b-88c5-de57d2812998 | Ubuntu_Precise | ERROR  | None       | NOSTATE     |          |
+--------------------------------------+----------------+--------+------------+-------------+----------+