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Maria BujoldMaria Bujold 

Something went wrong while executing the sumVisitors node

Hello all you fine people,
I'm getting a one-line error one one of my dataflows: 

Something went wrong while executing the sumVisitors node: invalid field expression q = group q by ('stats_date_Year', 'stats_date_Month');;q = foreach q generate 'stats_date_Year' + "~~~" + 'stats_date_Month' as 'stats_date_Year~~~stats_date_Month', sum('visitor_count') as 'sum_visitor_count';;q = order q by 'stats_date_Year~~~stats_date_Month' asc; for field 'Sum_Visitors': invalid expression 57349group (02K41000000oT5UEAU_03C41000001vBaBEAU)

Any suggestions on how to go about fixing this!?

thank you,
Maria