ID:13391 Verilog HDL error at <location>: replication multiplier contains X

CAUSE: In a Verilog Design File (.v) at the specified location, you used a replication operation with a multiplier value that contains a Don't Care (X) value. A replication operation must contain a non-zero, non-X, and non-Z constant expression.

ACTION: Make sure the multiplier value in a replication operation is a non-zero, non-X, and non-Z constant expression.