Why did my DDR3 UniPHY example design fail simulation?

Description

You may see a simulation failure when you parameterize UniPHY based DDR3 IP and simulate its auto-generated example design if you have followed the steps below:

1) Enable 'Advanced clock phase control' in a MegaWizard PHY setting
2) Set a value other than zero in 'Additional CK/CK# phase'
3) Disable 'Advanced clock phase control'
4) Generate the IP and example design

Resolution

\'Advanced clock phase control\' is not used for simulation but it is used to compensate for different board skews.
You need to clear the value to zero and then regenerate your IP and the example design.