"(XSCCOMP09) You cannot add new values to %j because it includes positions for precomputed aggregate values."
*Cause: The user attempted to create a new position in a compressed
composite, either directly (using MAINTAIN MERGE or
MAINTAIN ADD) or by storing a value into the variable
dimensioned by the compressed composite. This is not
allowed when the variable has been precomputed using
the AGGREGATE command. Once the AGGREGATE command is
run on a variable dimensioned by a compressed composite,
the compressed composite becomes read-only until
the computed values are removed with the CLEAR command.
*Action: Run the CLEAR AGGREGATES command to remove the computed
values from the variable and then rerun the failed
operation. Note that CLEAR AGGREGATES will remove all
the data computed during the last AGGREGATE command on