ID:13648 VHDL error at <location>: entity must be in current project's work library

CAUSE: In a VHDL Design File (.vhd) at the specified location, you used an entity that is not in the work library of the current project. All entities must be in the current project's work library.

ACTION: Remove the entity from the VHDL Design File, or add the entity to the current project's work library.