ID:13873 VHDL error at <location>: can't write to interface object "<name>" of mode IN

CAUSE: At the specified location in a VHDL Design File (.vhd), you used an interface object of mode IN. However, Quartus Prime Integrated Synthesis cannot write to the value of an interface object of mode IN.

ACTION: Change the mode of the interface object to OUT or INOUT, or use an existing interface object of mode OUT or INOUT.