ID:186322 DQS I/O and DQ I/O groups driven by different clocks must be placed on different sides of device

CAUSE: You made location assignments for DQS I/O and DQ I/O groups on the same side of the device. Due to hardware limitations, DQS I/O and DQ I/O groups driven by different clocks must be placed on different sides (top or bottom) of the device.

ACTION: Change or delete the location assignments.