Unexpected API Error Block Storage API

[Caballero]

When i attaches a volumen to a server i have this error:

curl -s -X POST https://$URL/v2.1/PROJECT_ID/servers/fSERVER_ID/os-volume_attachments -H "Content-Type: application/json" -H "X-Auth-Token: $TOKEN" -d '{"volumeAttachment": {"volumeId": "$VOLUMENID"}}'

ERROR:

{"computeFault": {"message": "Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.\n<class 'keystoneclient.exceptions.EmptyCatalog'>", "code": 500}}

the error is only with this action

[Takashi Natsume (natsume-takashi)]

Needs nova version and nova-api log files.