ID:15963 The datain input of delay chain primitive "<name>" is driven by the o output of an I/O input buffer primitive that has too many fanout. When the datain input is driven by the o output of an I/O input buffer primitive, that output can only have one other fanout to a directin input of a half-rate input primitive.

CAUSE: The o output of the I/O input buffer primitive that is driving the datain input of the specified delay chain primitive has another fanout that is not a directin input of a half-rate input primitive.

ACTION: Check the design and make sure that the specified o output does not drive another node that is not a directin input of a half-rate input primitive.