diff --git a/lib/register/positioned.rb b/lib/register/positioned.rb
index 732d1227..a93e03b7 100644
--- a/lib/register/positioned.rb
+++ b/lib/register/positioned.rb
@@ -1,19 +1,30 @@
 # Helper module that extract position attribute.
 module Positioned
+  @@positions = {}
+
+  def self.positions
+    @@positions
+  end
+
   def position
-    if @position.nil?
-      str = "IN machine #{Register.machine.objects.has_key?(self.object_id)}, at #{self.object_id.to_s(16)}\n"
-      raise str + "position not set for #{self.class} byte_length #{byte_length} for #{self.inspect[0...100]}"
+    pos = Positioned.positions[self]
+    if pos == nil
+      str = "position accessed but not set, "
+      str += "#{Register.machine.objects.has_key?(self.object_id)}, at #{self.object_id.to_s(16)}\n"
+      raise str + "for #{self.class} byte_length #{byte_length} for #{self.inspect[0...100]}"
     end
-    @position
+    pos
   end
   def position= pos
-    raise "Setting of nil not allowed" if pos.nil?
+    raise "Position must be number not :#{pos}:" unless pos.is_a?(Numeric)
     # resetting of position used to be error, but since relink and dynamic instruction size it is ok.
     # in measures (of 32)
-    if @position != nil and ((@position - pos).abs > 10000)
-      raise "position set again #{pos}!=#{@position} for #{self}"
+    old = Positioned.positions[self]
+    if old != nil and ((old - pos).abs > 10000)
+      raise "position set again #{pos}!=#{old} for #{self}"
     end
-    @position = pos
+    Positioned.positions[self] = pos
   end
+
+
 end
diff --git a/lib/typed/parfait/symbol_adapter.rb b/lib/typed/parfait/symbol_adapter.rb
index c667f7e6..36dcb9af 100644
--- a/lib/typed/parfait/symbol_adapter.rb
+++ b/lib/typed/parfait/symbol_adapter.rb
@@ -14,30 +14,5 @@ class Symbol
   def padded_length
     padded to_s.length + 4
   end
-  # not the prettiest addition to the game, but it wasn't me who decided symbols are frozen in 2.x
-  def cache_positions
-    unless defined?(@@symbol_positions)
-      @@symbol_positions = {}
-    end
-    @@symbol_positions
-  end
-  def position
-    pos = cache_positions[self]
-    if pos == nil
-      str = "position accessed but not set, "
-      str += "Machine has object=#{Register.machine.objects.has_key?(self.object_id)} "
-      raise str + " for Symbol:#{self}"
-    end
-    pos
-  end
-  def position= pos
-    # resetting of position used to be error, but since relink and dynamic instruction size it is ok.
-    # in measures (of 32)
-    old = cache_positions[self]
-    if old != nil and ((old - pos).abs > 20000)
-      raise "position set again #{pos}!=#{old} for #{self}"
-    end
-    cache_positions[self] = pos
-  end
 
 end
diff --git a/lib/typed/parfait/type.rb b/lib/typed/parfait/type.rb
index d9e6d80a..bffa808c 100644
--- a/lib/typed/parfait/type.rb
+++ b/lib/typed/parfait/type.rb
@@ -51,15 +51,19 @@ module Parfait
 
     def self.hash_code_for_hash( dict )
       index = 1
-      hash_code = ""
+      hash_code = 1
       dict.each do |name , type|
-        item_hash = name.to_s + type.to_s
-        hash_code  += item_hash #+ (item_hash / 256 ) * index
+        item_hash = str_hash(name) + str_hash(type)
+        hash_code  += item_hash + (item_hash / 256 ) * index
         index += 1
       end
-      hash_code.to_sym
+      hash_code
     end
 
+    def self.str_hash(str)
+      str = str.hash
+    end
+    
     def initialize( object_class , hash = {})
       super()
       private_add_instance_variable :type ,:Type