I am running into the same issue as well (RDO/Fedora 20/Icehouse). I am unable to delete older instances that have been marked as "ERROR" as well (ie, nova delete <instance name> does not remove them).
I am running into the same issue as well (RDO/Fedora 20/Icehouse). I am unable to delete older instances that have been marked as "ERROR" as well (ie, nova delete <instance name> does not remove them).