ID:176508 Can't place DQS I/O pin "<name>" in location <name> -- can't also place nDQS I/O pin "<name>" that feeds DQS I/O pin

CAUSE: The Fitter could not place the specified DQS I/O pin in the specified location because its corresponding nDQS I/O pin could not be placed. You may have made location assignments which resulted in the Fitter attempting to place the DQS I/O pin in the specified location. If you did not make a location assignment, the specified location represents the last location in which the Fitter attempted to place the specified DQS I/O pin.

ACTION: If you made location assignments to the specified DQS I/O pin or nDQS I/O pins fed by the DQS I/O pin, remove them or remove location assignments to other I/O pins in the design. If this does not result in a successful fit, compile the design targeting a larger device.