ID:15852 Output port "<name>" of PSEUDO_DIFF_OUT primitive "<name>" must drive only one OBUF primitive on the I port and cannot drive anything else

CAUSE: The specified PSEUDO_DIFF_OUT primitive is not connected properly. It should drive only an OBUF primitive on the I port and nothing else.

ACTION: Check your design to make sure that the PSEUDO_DIFF_OUT properly drives out to only the I port of an OBUF primitive and nothing else.