ID:10550 VHDL Subprogram Declaration error at <location>: object class for formal parameter cannot be <name>

CAUSE: In a Subprogram Declaration at the specified location in a VHDL Design File (.vhd), you used the specified object class for a formal parameter. However, the formal parameter must have an object class of CONSTANT, VARIABLE, SIGNAL, or FILE.

ACTION: Change the object class of the formal parameter to CONSTANT, VARIABLE, SIGNAL, or FILE.