Critical Issue
Description
A design compiled in the Quartus II software version 10.1 cannot be directly recompiled in version 11.0, for speeds greater than 500 MHz.
Resolution
The workaround for this issue is to load the <variation_name>.v
file
generated by the version 10.1 MegaWizard Plug-In Manager into the
version 11.0 MegaWizard Plug-In Manager and regenerate the IP core
in version 11.0.