What's wrong with this statement?

public pcTotal
public pcValue
pcValue = Thisform.pageframe1.page2.sz1.displayvalue

SELECT data1.total ;
FROM lumber!data1 ;
WHERE siz = pcValue ;
INTO Cursor totals ;

pcTotal = sum ( totals ) ;


I'm trying to gather all data in the field data1.total, sum it, give it a variable reference, and use it in a report.