ContributionsMost RecentNewest TopicsMost LikesSolutionsMALException Hi I need help with this error I receive after I have created a custom column and I want to use the same columns to do calculation on. Example of the custom column: Select (Case When [NPS_rating_Answer_Value]>=9 then Count([Result_ID]) Else Null END) as "Promotors" FROM [result_answer_questions.csv] group by [NPS_rating_Answer_Value],[NPS_rating_Answer_Value] The calculation I am trying to do : ([Promotors]-[Detractors])/[Total_NPS_Answr_Value] But I am getting the below error: MALException:run_default_logic_inst_prll failed: failed to apply parallel default logic How do you solve this error: