ID:15944 The dqsupdateen input of DQS delay chain "<name>" may not be driven by an inverted dqsupdate output of a DLL.
CAUSE: The dqsupdateen
input of the specified DQS delay chain is driven by an inverted dqsupdate
output of a DLL.
ACTION: Change the design so that the dqsupdate
output of the DLL is not inverted.