ID:13649 VHDL error at <location>: entity "<name>" is used but not declared

CAUSE: In a VHDL Design File (.vhd) at the specified location, you used the specified entity. However, you did not declare the entity in an Entity Declaration. You must declare an entity before you can use it.

ACTION: Use an Entity Declaration to declare the entity, or remove the reference to the entity from the design.