Elaboration of a design containing an ALTGX megafunction that targets a Stratix IV GX devices fails if ATX PLL is turned on

Description

In the ALTGX MegaWizard Plug-In Manager, if on the General tab of the Parameter Settings page, you set What protocol will you be using to Basic (PMA Direct) and Which subprotocol will you be using to None, and on the PLL/Ports tab, you turn on Auxiliary Transmitter (ATX) PLL, elaboration fails.

Resolution

To use an ATX PLL with the Basic (PMA Direct) protocol, set Which subprotocol will you be using to XN.