diff --git a/src/archive_exception.cpp b/src/archive_exception.cpp
index 773081b5..589915c3 100644
--- a/src/archive_exception.cpp
+++ b/src/archive_exception.cpp
@@ -61,8 +61,8 @@ archive_exception::archive_exception(
     case array_size_too_short:
         m_msg = "array size too short";
         break;
-    case stream_error:
-        m_msg = "stream error";
+    case input_stream_error:
+        m_msg = "input stream error";
         break;
     case invalid_class_name:
         m_msg = "class name too long";
@@ -89,6 +89,9 @@ archive_exception::archive_exception(
             m_msg += e1;
         }    
         break;
+    case output_stream_error:
+        m_msg = "output stream error";
+        break;
     default:
         assert(false);
         break;
diff --git a/src/basic_iarchive.cpp b/src/basic_iarchive.cpp
index 424c0e9d..c06b9b75 100644
--- a/src/basic_iarchive.cpp
+++ b/src/basic_iarchive.cpp
@@ -291,11 +291,6 @@ inline class_id_type
 basic_iarchive_impl::register_type(
     const basic_iserializer & bis
 ){
-    assert(
-        cobject_info_set.size() 
-        <= 
-        boost::integer_traits<class_id_type>::const_max
-    );
     class_id_type cid(cobject_info_set.size());
     cobject_type co(cid, bis);
     std::pair<cobject_info_set_type::const_iterator, bool>
@@ -320,7 +315,7 @@ basic_iarchive_impl::load_preamble(
 ){
     if(! co.initialized){
         if(co.bis_ptr->class_info()){
-            class_id_optional_type cid;
+            class_id_optional_type cid(class_id_type(0));
             load(ar, cid);    // to be thrown away
             load(ar, co.tracking_level);
             load(ar, co.file_version);
@@ -380,7 +375,7 @@ basic_iarchive_impl::load_object(
 
     object_id_type this_id;
     moveable_objects_start =
-    this_id = object_id_vector.size();
+    this_id = object_id_type(object_id_vector.size());
 
     // if we tracked this object when the archive was saved
     if(tracking){ 
@@ -391,7 +386,7 @@ basic_iarchive_impl::load_object(
         // add a new enty into the tracking list
         object_id_vector.push_back(aobject(t, cid));
         // and add an entry for this object
-        moveable_objects_end = object_id_vector.size();
+        moveable_objects_end = object_id_type(object_id_vector.size());
     }
     // read data
     (bis.load_object_data)(ar, t, co.file_version);
@@ -416,11 +411,6 @@ basic_iarchive_impl::load_pointer(
         return bpis_ptr;
     }
 
-    assert(
-        cobject_info_set.size() 
-        <= 
-        boost::integer_traits<class_id_type>::const_max
-    );
     // if its a new class type - i.e. never been registered
     if(class_id_type(cobject_info_set.size()) <= cid){
         // if its either abstract
diff --git a/src/basic_oarchive.cpp b/src/basic_oarchive.cpp
index 93ac1360..0fb0a7d9 100644
--- a/src/basic_oarchive.cpp
+++ b/src/basic_oarchive.cpp
@@ -224,11 +224,6 @@ basic_oarchive_impl::find(const serialization::extended_type_info & ti) const {
 inline const basic_oarchive_impl::cobject_type &
 basic_oarchive_impl::find(const basic_oserializer & bos)
 {
-    assert(
-        cobject_info_set.size() 
-        <= 
-        boost::integer_traits<class_id_type>::const_max
-    );
     std::pair<cobject_info_set_type::iterator, bool> cresult = 
         cobject_info_set.insert(cobject_type(cobject_info_set.size(), bos));
     return *(cresult.first);
@@ -238,11 +233,6 @@ inline const basic_oarchive_impl::cobject_type &
 basic_oarchive_impl::register_type(
     const basic_oserializer & bos
 ){
-    assert(
-        cobject_info_set.size() 
-        <= 
-        boost::integer_traits<class_id_type>::const_max
-    );
     cobject_type co(cobject_info_set.size(), bos);
     std::pair<cobject_info_set_type::const_iterator, bool>
         result = cobject_info_set.insert(co);
diff --git a/src/basic_xml_grammar.ipp b/src/basic_xml_grammar.ipp
index 0d7682bb..312cd526 100644
--- a/src/basic_xml_grammar.ipp
+++ b/src/basic_xml_grammar.ipp
@@ -181,7 +181,7 @@ bool basic_xml_grammar<CharType>::my_parse(
 ) const {
     if(is.fail()){
         boost::serialization::throw_exception(
-            archive_exception(archive_exception::stream_error)
+            archive_exception(archive_exception::input_stream_error)
         );
     }
     
@@ -321,7 +321,7 @@ basic_xml_grammar<CharType>::basic_xml_grammar(){
         str_p(BOOST_ARCHIVE_XML_CLASS_ID()) >> NameTail
         >> Eq 
         >> L'"'
-        >> int_p [xml::assign_object(rv.class_id.t)]
+        >> int_p [xml::assign_object(rv.class_id)]
         >> L'"'
       ;
 
@@ -334,7 +334,7 @@ basic_xml_grammar<CharType>::basic_xml_grammar(){
         >> Eq 
         >> L'"'
         >> L'_'
-        >> uint_p [xml::assign_object(rv.object_id.t)]
+        >> uint_p [xml::assign_object(rv.object_id)]
         >> L'"'
     ;
         
@@ -372,7 +372,7 @@ basic_xml_grammar<CharType>::basic_xml_grammar(){
         str_p(BOOST_ARCHIVE_XML_VERSION())
         >> Eq
         >> L'"'
-        >> uint_p [xml::assign_object(rv.version.t)]
+        >> uint_p [xml::assign_object(rv.version)]
         >> L'"'
     ;