If you turn on Enable systolic delay registers in the ALTMULT_ADD MegaWizard Plug-In Manager generation fails for Stratix V

On the Systolic/Preload page of the ALTMULT_ADD MegaWizard Plug-In Manager, if you turn on Enable systolic delay registers, generation fails with messages similar to the following: Error: Illegal parameter value: SYSTOLIC_DELAY1 and SYSTOLIC_DELAY3 are used without chainin port

Error: Assertion error: The current megafunction is configured for use with the clear box feature and cannot be used when the clear box feature is disabled.

The systolic delay registers feature is not available in the current release of the Stratix V ALTMULT_ADD megafunction. Do not turn on Enable systolic delay registers.