NNL-00014
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.