| ERROR | unknown data type string |
| CAUSE | The user issued a name server request which contained an unknown data type. |
| ACTION | It is possible that the server had no information on the type, but automatically fetched it in response to the failing request. Re-issue the failing request; if the server has in the meantime fetched the appropriate data type information, the error will go away. If the error persists, the data type is probably invalid. |