Why can't I connect the transceiver reconfig_to/from_xcvr ports between the Reconfiguration Controller and the 1G/10GbE and 10GBASE-KR PHY IP in QSYS on Stratix V GX devices using Quartus II software versions 12.1 and earlier?

It is not possible to connect the transceiver reconfig_to/from_xcvr ports between the reconfiguration controller and the 1G/10GbE and 10GBASE-KR PHY IP in QSYS on Stratix® V GX devices due to a bug in the Quartus® II software versions 12.1 and earlier.

To work around this problem, export the reconfig_to/from_xcvr ports of the transceiver Reconfiguration Controller and the 1G/10GbE and 10GBASE-KR PHY IP and connect in your RTL.

This issue will be fixed in a future version of the Quartus II software.