The v14.0 is correct.
This function was changed by RO64655 of r12.6.
ERR79 CHAINING FROM BASE 111111: VOLUME 111111 WARNING: DSN17 IS HEXZERO
In above case,The TMSUPDTE REP statement will not be generated to adjust this.Because,HEXZEROS is a valid value.
Therefore, your ca1 is working correctly.
APAR #: RO64655
When an active volume has HEXZEROS for DSN17, TMSPTRS attempts to fix and change the value. HEXZEROS is a valid value. ERR79 will still be reported after this PTF, but a TMSUPDTE REP statement will not be generated to adjust this.