This is a very important event to implement on an Engine component. It
is invoked when a parsing error occurs.
procedure TServerForm.hl7EngineParseError(Sender: TObject;
MessageData: String; TransportIndex: Integer; Description: String;
Code: Cardinal);
begin
hl7Engine.WriteToLog('Bad message.');
hl7Engine.WriteToLog(Description);
// Log the message so it can be analyzed later
end;