FRM1021 The aggregate usage code can only be used when the column
has a numeric data type.
Explanation
The SUM, CSUM, AVERAGE, STDEV, PCT, TPCT, CPCT, and
TCPCT usage codes can only be used with numeric columns.
User response
Specify a different usage code than SUM, CSUM, AVERAGE,
STDEV, PCT, TPCT, CPCT, or TCPCT for non-numeric columns.