"(XSAGZERO) AGGREGATE attempted to divide by zero. Set DIVIDEBYZERO to YES if you want NA to be returned as the result of a division by zero."
*Cause: A calculation in the current AGGREGATE command attempted to
divide by zero as a result of an AVERAGE, WAVERAGE, HAVERAGE or HWAVERAGE
*Action: Either fix the data, or set DIVIDEBYZERO to YES to return NA instead of signaling an error.