DFS1595I SC=04 MAXIMUM VALUE FOR MIX/MIXS'`nn`' is 31, DEFAULT SET AS `xx`

Explanation
 The value specified on the MIX/MIXS'nn '
keyword exceeded the maximum of 31; xx is used
as the default.

System action
 Processing continues.

Programmer response
 If the default MIX/MIXS'nn' value is not
sufficient, correct the value; then rerun the job, if necessary.