IKJ79016I   STMT nn THE WHEN EXPRESSION MUST BE PARENTHESIZED.

Expressions on the WHEN clause of a SELECT statement must be enclosed in parentheses. An expression on a WHEN clause was found without parentheses around it, and the CLIST cannot be executed.

To correct the WHEN clause, enclose the expression in parentheses. For more information about the SELECT statement, see z/OS TSO/E CLISTs.