a OLc Message Error can be sent at any point of a message transmission. When
a message error is transmitted by one party, the current transmission should
be aborted. This means the request message to the server should be
interrupted, and the client should stop reading any answer.
It is expected data rollback will be performed as much as possible from the
server side (though this is not guaranteed). However, it is recommended the
client queries again the data from the server.
MessageError is serialized as