Due to a bug in the Quartus® II software version 13.1, you may see the Fitter error above.
Device Family: Stratix® V, Stratix® V GS, Stratix® V GT, Stratix® V GX
Area: Component, HSIO
This is a known problem and will be fixed in a future version of the Quartus II software.
You may use Quartus II software version 13.0 to work around this problem.