ID:20867 OCT cannot calibrate across different IO columns. Ensure that: \t\t1) All buffers requesting OCT are connected to an explicitly instantiated OCT. \t\t2) Buffers connected to the same OCT are not location-constrainted to different columns. \t\t3) The OCT and the buffers are not pin-constrained to different columns.

CAUSE: OCT is unable to connect to the requested buffers.

ACTION: Change the design so that a connection exists between the buffer and the OCT.