Compile (CM) Messages › › IDCMSELX11 - Comparison between a NULL ineligible operand and the NULL keyword is invalid

IDCMSELX11 - Comparison between a NULL ineligible operand and the NULL keyword is invalid

Reason:

In the following construct, the identifier must be NULL-ineligible:

SELECT identifier
    :
ENDSEL The WHEN NULL clause is, therefore, invalid since it is never true.

Action:

Restructure the SELECT clause appropriately.