Cyclone V differential HSSI REFCLK implementation

By connecting the positive or non-negated clock input to the transceiver phy rx_cdr_refclk and reconfiguration_controller mgmt_clk_clk, I was able to eliminate the no fanout error for the adc_dco_p pin. Now i get the same error for the adc_dco_n pin. I have tried eliminating the pin and connecting it to a separate pll, phy, and reconfig controller, but still get errors. What do you do with the negated pin of the differential pair connected to differential HSSI REFCLK inputs?

Thanks.

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I tried your suggestion and removed the ALTIOBUF and directly used the refclk non-inverted pin, but I still get the same error.

Error (177035): The input pin adc_dco_p assigned to HSSI Pin_AA11 has no fanout.

I found the following information at quartushelp.altera.com:

<direction> pin <name> assigned to hssi <name> has no <fanin_or_fanout>.

(ID: 177035)

CAUSE:

The specified pin is assigned to an HSSI input/output and has no fan-out (http://www.alteraforum.com/reference/glossary/def_fan.htm) and fan-in. HSSI input/output must be connected with exception of reserved refclk pins.

ACTION:

Remove the specified pin, location assignment, or both. Or if it is refclk, set as reserved

How do I set the refclk pins to reserved?

Thanks.

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