diff --git a/lib/register/builtin/object.rb b/lib/register/builtin/object.rb
index 10534c7d..0a1f36ed 100644
--- a/lib/register/builtin/object.rb
+++ b/lib/register/builtin/object.rb
@@ -26,7 +26,7 @@ module Register
           compiler = compiler_for(:Object , :set_internal_word , {:value => :Object} )
           source = "set_internal_word"
           me , index = self_and_int_arg(compiler,source)
-          value = load_arg_at(compiler,source , 2)
+          value = load_int_arg_at(compiler,source , 2)
 
           # do the set
           compiler.add_code RegToSlot.new( source , value , me , index)
diff --git a/lib/register/builtin/word.rb b/lib/register/builtin/word.rb
index 4d5e6af7..3a0eb5a6 100644
--- a/lib/register/builtin/word.rb
+++ b/lib/register/builtin/word.rb
@@ -34,9 +34,12 @@ module Register
         # no return
         def set_internal_byte context
           compiler = compiler_for(:Word, :set_internal_byte , {:value => :Integer} )
+          args = compiler.method.arguments
+          len = args.instance_length
+          raise "Compiler arg number mismatch, method=#{args} " if  len != 3
           source = "set_internal_byte"
           me , index = self_and_int_arg(compiler,source)
-          value = load_arg_at(compiler , source , 2 )
+          value = load_int_arg_at(compiler , source , 2 )
           # do the set
           compiler.add_code RegToByte.new( source , value , me , index)
           return compiler.method
diff --git a/lib/register/instructions/setter.rb b/lib/register/instructions/setter.rb
index 783e5a8f..e7935e07 100644
--- a/lib/register/instructions/setter.rb
+++ b/lib/register/instructions/setter.rb
@@ -28,7 +28,7 @@ module Register
     attr_accessor :register , :array , :index
 
     def to_s
-      "#{self.class.name}: #{array}[#{index}] -> #{register}"
+      "#{self.class.name}: #{register} -> #{array}[#{index}]"
     end
 
   end
diff --git a/lib/typed/parfait/type.rb b/lib/typed/parfait/type.rb
index e0d28db7..d9e6d80a 100644
--- a/lib/typed/parfait/type.rb
+++ b/lib/typed/parfait/type.rb
@@ -60,16 +60,20 @@ module Parfait
       hash_code.to_sym
     end
 
-    def initialize( object_class , hash = nil)
+    def initialize( object_class , hash = {})
       super()
       private_add_instance_variable :type ,:Type
       self.object_class = object_class
       hash.each do |name , type|
         private_add_instance_variable(name , type) unless name == :type
-      end if hash
+      end
       self.instance_methods = List.new
     end
 
+    def to_s
+      ""
+    end
+
     def methods
       m = self.instance_methods
       return m if m
diff --git a/test/register/interpreter/test_all.rb b/test/register/interpreter/test_all.rb
index 5a1e0eaf..64c60c33 100644
--- a/test/register/interpreter/test_all.rb
+++ b/test/register/interpreter/test_all.rb
@@ -1,7 +1,8 @@
 require_relative "test_add"
 require_relative "test_change"
 require_relative "test_byte_to_reg"
-require_relative "test_if"
+require_relative "test_called_if"
+require_relative "test_simple_if"
 require_relative "test_puts"
 require_relative "test_plus"
 require_relative "test_mult"