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Honored Contributor I
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“HSSI_REFCLK_CLUSTER” error on Arria 10

If you run into errors with “HSSI_REFCLK_CLUSTER” when compiling for Arria 10, check if you are using an fPLL to drive core logic. If so, try inserting a clock buffer (ALTCLK_CTRL) between your input pin and the fPLL.

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