bad_sv_unify_msg.m:015: In predicate `x'/2:
bad_sv_unify_msg.m:015:   warning: unresolved polymorphism.
bad_sv_unify_msg.m:015:   The variable with an unbound type was:
bad_sv_unify_msg.m:015:     STATE_VARIABLE_D_0: T
bad_sv_unify_msg.m:015:   The unbound type variable will be implicitly bound to
bad_sv_unify_msg.m:015:   the builtin type `void'.
bad_sv_unify_msg.m:021: Error: !D cannot appear as a unification argument.
bad_sv_unify_msg.m:021:   You probably meant !.D or !:D.
bad_sv_unify_msg.m:022: In clause for `x(di, uo)':
bad_sv_unify_msg.m:022:   in argument 1 of call to predicate `io.write'/3:
bad_sv_unify_msg.m:022:   mode error: variable `STATE_VARIABLE_D_0' has
bad_sv_unify_msg.m:022:   instantiatedness `free',
bad_sv_unify_msg.m:022:   expected instantiatedness was `ground'.
bad_sv_unify_msg.m:022: In clause for predicate `x'/2:
bad_sv_unify_msg.m:022:   warning: variable `STATE_VARIABLE_D_0' occurs only
bad_sv_unify_msg.m:022:   once in this scope.
For more information, recompile with `-E'.