<oml:run xmlns:oml="http://openml.org/openml">
  <oml:task_id>3754</oml:task_id>
  <oml:implementation_id>663</oml:implementation_id>
  <oml:error_message>Error in lda.default(x, grouping, ...) : 
  variable 6 appears to be constant within groups
</oml:error_message>
</oml:run>