WsSQL - Type validation failure of the sum(column) entry in select clause

A WsSQL select query using aggregates (sum) is failing with the error "Could not verify field: totalboothprice". Per Rodrigo Pastrana: "I broke the query down and it appears to fail on type validation of the sum(column) entry in the select clause".

select sum(totalboothprice) from reed::in::salesrevenuebreakout where event = 'INT' and customerid = 1072602 and edition = 2014 group by totalboothprice

Filing on behalf of Ryan Jacovich at Reed Exhibitions (rjacovich@reedexpo.com). Original email describing issue is attached.