This exception must be thrown in case the requested nameclash
directive is not supported, because it is not possible to implement
it or if it is just not (yet) implemented.
Command 'transfer': Used if the nameclash directive specified in
parameter NameClash of the supplied TransferInfo is not
supported. For example, if the NameClash was set to NameClash::ERROR,
to NameClash::RENAME or to NameClash::ASK, the implementation must be
able determine whether there are existing data. This exception must also
be used if NameClash::RENAME was specified and the implementation is
unable to create a valid new name after a suitable number of tries.
Command 'insert': Used if the parameter ReplaceExisting of the
supplied InsertCommandArgument was set to false and the
implementation is unable to determine whether there are existing data.
The member NameClash of the exception must be set to NameClash::ERROR
