diff --git a/include/boost/cregex.hpp b/include/boost/cregex.hpp
index f280a2c6..2cb2b5a4 100644
--- a/include/boost/cregex.hpp
+++ b/include/boost/cregex.hpp
@@ -242,6 +242,7 @@ public:
    unsigned int SetExpression(const char* p, bool icase = false);
    unsigned int SetExpression(const std::string& s, bool icase = false){ return SetExpression(s.c_str(), icase); }
    std::string Expression()const;
+   unsigned int error_code()const;
    //
    // now matching operators:
    //
diff --git a/include/boost/regex.hpp b/include/boost/regex.hpp
index d218873d..e03aafaf 100644
--- a/include/boost/regex.hpp
+++ b/include/boost/regex.hpp
@@ -794,7 +794,10 @@ int do_toi(iterator i, iterator j, char c, int radix)
    std::string s(i, j);
    char* p;
    int result = std::strtol(s.c_str(), &p, radix);
+#ifndef BOOST_NO_EXCEPTIONS
    if(*p)throw bad_pattern("Bad sub-expression");
+#endif
+   BOOST_REGEX_NOEH_ASSERT(0 == *p)
    return result;
 }
 
@@ -819,7 +822,10 @@ sub_match<iterator>::operator int()const
 {
    iterator i = first;
    iterator j = second;
+#ifndef BOOST_NO_EXCEPTIONS
    if(i == j)throw bad_pattern("Bad sub-expression");
+#endif
+   BOOST_REGEX_NOEH_ASSERT(i != j)
    int neg = 1;
    if((i != j) && (*i == '-'))
    {
@@ -827,7 +833,10 @@ sub_match<iterator>::operator int()const
       ++i;
    }
    neg *= re_detail::do_toi(i, j, *i);
+#ifndef BOOST_NO_EXCEPTIONS
    if(i != j)throw bad_pattern("Bad sub-expression");
+#endif
+   BOOST_REGEX_NOEH_ASSERT(i == j)
    return neg;
 }
 template <class iterator>
@@ -835,8 +844,11 @@ sub_match<iterator>::operator unsigned int()const
 {
    iterator i = first;
    iterator j = second;
+#ifndef BOOST_NO_EXCEPTIONS
    if(i == j)
       throw bad_pattern("Bad sub-expression");
+#endif
+   BOOST_REGEX_NOEH_ASSERT(i != j)
    return re_detail::do_toi(i, j, *first);
 }
 #endif
@@ -1063,27 +1075,33 @@ template <class iterator, class Allocator>
 match_results_base<iterator, Allocator>::match_results_base(const Allocator& a)
 {
    ref = (c_reference*)c_alloc(a).allocate(sizeof(sub_match<iterator>) + sizeof(c_reference));
+#ifndef BOOST_NO_EXCEPTIONS
    try
    {
+#endif
       new (ref) c_reference(a);
       ref->cmatches = 1;
       ref->count = 1;
       // construct the sub_match<iterator>:
+#ifndef BOOST_NO_EXCEPTIONS
       try
       {
+#endif
          new ((sub_match<iterator>*)(ref+1)) sub_match<iterator>();
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
-      { 
-         ::boost::re_detail::pointer_destroy(ref); 
-         throw; 
+      {
+         ::boost::re_detail::pointer_destroy(ref);
+         throw;
       }
    }
    catch(...)
-   { 
-      c_alloc(a).deallocate((char*)(void*)ref, sizeof(sub_match<iterator>) + sizeof(c_reference)); 
-      throw; 
+   {
+      c_alloc(a).deallocate((char*)(void*)ref, sizeof(sub_match<iterator>) + sizeof(c_reference));
+      throw;
    }
+#endif
 }
 
 template <class iterator, class Allocator>
@@ -1148,25 +1166,30 @@ void BOOST_REGEX_CALL match_results_base<iterator, Allocator>::set_size(size_typ
    if(ref->cmatches != n)
    {
       c_reference* newref = (c_reference*)ref->allocate(sizeof(sub_match<iterator>) * n + sizeof(c_reference));
+#ifndef BOOST_NO_EXCEPTIONS
       try
       {
+#endif
          new (newref) c_reference(*ref);
          newref->count = 1;
          newref->cmatches = n;
          sub_match<iterator>* p1, *p2;
          p1 = (sub_match<iterator>*)(newref+1);
          p2 = p1 + newref->cmatches;
+#ifndef BOOST_NO_EXCEPTIONS
          try
          {
+#endif
             while(p1 != p2)
             {
                new (p1) sub_match<iterator>();
                ++p1;
             }
             m_free();
+#ifndef BOOST_NO_EXCEPTIONS
          }
          catch(...)
-         { 
+         {
             p2 = (sub_match<iterator>*)(newref+1);
             while(p2 != p1)
             {
@@ -1174,15 +1197,18 @@ void BOOST_REGEX_CALL match_results_base<iterator, Allocator>::set_size(size_typ
                ++p2;
             }
             ::boost::re_detail::pointer_destroy(ref);
-            throw; 
+            throw;
          }
+#endif
          ref = newref;
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
-      { 
-         ref->deallocate((char*)(void*)newref, sizeof(sub_match<iterator>) * n + sizeof(c_reference)); 
-         throw; 
+      {
+         ref->deallocate((char*)(void*)newref, sizeof(sub_match<iterator>) * n + sizeof(c_reference));
+         throw;
       }
+#endif
    }
 }
 
@@ -1192,20 +1218,25 @@ void BOOST_REGEX_CALL match_results_base<iterator, Allocator>::set_size(size_typ
    if(ref->cmatches != n)
    {
       c_reference* newref = (c_reference*)ref->allocate(sizeof(sub_match<iterator>) * n + sizeof(c_reference));;
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
          new (newref) c_reference(*ref);
          newref->count = 1;
          newref->cmatches = n;
          sub_match<iterator>* p1 = (sub_match<iterator>*)(newref+1);
          sub_match<iterator>* p2 = p1 + newref->cmatches;
+#ifndef BOOST_NO_EXCEPTIONS
          try
          {
+#endif
             while(p1 != p2)
             {
                new (p1) sub_match<iterator>(j);
                ++p1;
             }
             m_free();
+#ifndef BOOST_NO_EXCEPTIONS
          }
          catch(...)
          { 
@@ -1218,13 +1249,16 @@ void BOOST_REGEX_CALL match_results_base<iterator, Allocator>::set_size(size_typ
             ::boost::re_detail::pointer_destroy(ref);
             throw; 
          }
+#endif
          ref = newref;
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
       { 
          ref->deallocate((char*)(void*)newref, sizeof(sub_match<iterator>) * n + sizeof(c_reference)); 
          throw; 
       }
+#endif
    }
    else
    {
@@ -1298,19 +1332,24 @@ void BOOST_REGEX_CALL match_results_base<iterator, Allocator>::cow()
    if(ref->count > 1)
    {
       c_reference* newref = (c_reference*)ref->allocate(sizeof(sub_match<iterator>) * ref->cmatches + sizeof(c_reference));
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
          new (newref) c_reference(*ref);
          newref->count = 1;
          sub_match<iterator>* p1 = (sub_match<iterator>*)(newref+1);
          sub_match<iterator>* p2 = p1 + newref->cmatches;
          sub_match<iterator>* p3 = (sub_match<iterator>*)(ref+1);
+#ifndef BOOST_NO_EXCEPTIONS
          try{
+#endif
             while(p1 != p2)
             {
                new (p1) sub_match<iterator>(*p3);
                ++p1;
                ++p3;
             }
+#ifndef BOOST_NO_EXCEPTIONS
          }
          catch(...)
          { 
@@ -1323,14 +1362,17 @@ void BOOST_REGEX_CALL match_results_base<iterator, Allocator>::cow()
             ::boost::re_detail::pointer_destroy(ref);
             throw; 
          }
+#endif
       --(ref->count);
       ref = newref;
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
       { 
          ref->deallocate((char*)(void*)newref, sizeof(sub_match<iterator>) * ref->cmatches + sizeof(c_reference)); 
          throw; 
       }
+#endif
    }
 }
 
@@ -1418,19 +1460,24 @@ match_results<iterator, Allocator>::match_results(const match_results<iterator,
       reinterpret_cast<typename re_detail::match_results_base<iterator, Allocator>::c_reference *>
          (m.ref->allocate(sizeof(sub_match<iterator>) * m.ref->cmatches +
                           sizeof(typename re_detail::match_results_base<iterator, Allocator>::c_reference)));
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
       new (this->ref) typename re_detail::match_results_base<iterator, Allocator>::c_reference(*m.ref);
       this->ref->count = 1;
       sub_match<iterator>* p1 = (sub_match<iterator>*)(this->ref+1);
       sub_match<iterator>* p2 = p1 + this->ref->cmatches;
       sub_match<iterator>* p3 = (sub_match<iterator>*)(m.ref+1);
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
          while(p1 != p2)
          {
             new (p1) sub_match<iterator>(*p3);
             ++p1;
             ++p3;
          }
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
       { 
@@ -1449,6 +1496,7 @@ match_results<iterator, Allocator>::match_results(const match_results<iterator,
       m.ref->deallocate((char*)(void*)this->ref, sizeof(sub_match<iterator>) * m.ref->cmatches + sizeof(typename re_detail::match_results_base<iterator, Allocator>::c_reference));
       throw; 
    }
+#endif
 }
 
 template <class iterator, class Allocator>
diff --git a/include/boost/regex/config.hpp b/include/boost/regex/config.hpp
index e98319b3..28b8d35a 100644
--- a/include/boost/regex/config.hpp
+++ b/include/boost/regex/config.hpp
@@ -273,6 +273,35 @@ using std::distance;
 #  include <windows.h>
 #endif
 
+/*****************************************************************************
+ *
+ *  Error Handling for exception free compilers:
+ *
+ ****************************************************************************/
+
+#ifdef BOOST_NO_EXCEPTIONS
+//
+// If there are no exceptions then we must report critical-errors
+// the only way we know how; by terminating.
+//
+#ifdef __BORLANDC__
+// <cstdio> seems not to make stderr usable with Borland:
+#include <stdio.h>
+#endif
+#  define BOOST_REGEX_NOEH_ASSERT(x)\
+if(0 == (x))\
+{\
+   std::fprintf(stderr, "Error: critical regex++ failure in \"%s\"", #x);\
+   std::abort();\
+}
+#else
+//
+// With exceptions then error handling is taken care of and
+// there is no need for these checks:
+//
+#  define BOOST_REGEX_NOEH_ASSERT(x)
+#endif
+
 /*****************************************************************************
  *
  *  Debugging / tracing support:
@@ -516,6 +545,10 @@ namespace std{
    using ::fopen;
    using ::fclose;
    using ::FILE;
+#ifdef BOOST_NO_EXCEPTIONS
+   using ::fprintf;
+   using ::abort;
+#endif
 }
 
 #endif
diff --git a/include/boost/regex/detail/regex_compile.hpp b/include/boost/regex/detail/regex_compile.hpp
index 18f3eee6..e7bb5bd8 100644
--- a/include/boost/regex/detail/regex_compile.hpp
+++ b/include/boost/regex/detail/regex_compile.hpp
@@ -1167,8 +1167,10 @@ void BOOST_REGEX_CALL reg_expression<charT, traits, Allocator>::fixup_apply(re_d
    register re_detail::re_syntax_base* ptr = b;
    bool* pb = 0;
    b_alloc a(data.allocator());
+#ifndef BOOST_NO_EXCEPTIONS
    try
    {
+#endif
       pb = a.allocate(cbraces);
       for(unsigned i = 0; i < cbraces; ++i)
          pb[i] = false;
@@ -1232,6 +1234,7 @@ void BOOST_REGEX_CALL reg_expression<charT, traits, Allocator>::fixup_apply(re_d
       }
       a.deallocate(pb, cbraces);
       pb = 0;
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
@@ -1239,6 +1242,7 @@ void BOOST_REGEX_CALL reg_expression<charT, traits, Allocator>::fixup_apply(re_d
          a.deallocate(pb, cbraces);
       throw;
    }
+#endif
 }
 
 
@@ -2053,10 +2057,12 @@ void BOOST_REGEX_CALL reg_expression<charT, traits, Allocator>::fail(unsigned in
    if(err)
    {
       _flags |= regbase::failbit;
+#ifndef BOOST_NO_EXCEPTIONS
       if(_flags & regbase::use_except)
       {
          throw bad_expression(traits_inst.error_string(err));
       }
+#endif
    }
    else
       _flags &= ~regbase::failbit;
diff --git a/src/c_regex_traits.cpp b/src/c_regex_traits.cpp
index 8faee829..a0b2e0f7 100644
--- a/src/c_regex_traits.cpp
+++ b/src/c_regex_traits.cpp
@@ -199,14 +199,19 @@ void BOOST_REGEX_CALL re_init_classes()
    if(classes_count == 0)
    {
       re_cls_name = new std::string("xxxxxxxx");
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
          pclasses = new std::string[re_classes_max];
+         BOOST_REGEX_NOEH_ASSERT(pclasses)
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
       {
          delete re_cls_name;
          throw;
       }
+#endif
    }
    ++classes_count;
 }
@@ -243,14 +248,19 @@ void BOOST_REGEX_CALL re_init_collate()
    if(collate_count == 0)
    {
       re_coll_name = new std::string("xxxxxxxx");
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
          pcoll_names = new std::list<collate_name_t>();
+         BOOST_REGEX_NOEH_ASSERT(pcoll_names)
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
       {
          delete re_coll_name;
          throw;
       }
+#endif
    }
    ++collate_count;
 }
@@ -345,11 +355,15 @@ void BOOST_REGEX_CALL re_message_update()
       if(*boost::re_detail::c_traits_base::get_catalogue())
       {
          message_cat = catopen(boost::re_detail::c_traits_base::get_catalogue(), 0);
+#ifndef BOOST_NO_EXCEPTIONS
          if(message_cat == (nl_catd)-1)
          {
             std::string m("Unable to open message catalog: ");
             throw std::runtime_error(m + boost::re_detail::c_traits_base::get_catalogue());
          }
+#else
+         BOOST_REGEX_NOEH_ASSERT(message_cat != (nl_catd)-1);
+#endif
       }
 #endif
       for(int i = 0; i < boost::REG_E_UNKNOWN; ++i)
@@ -592,14 +606,19 @@ void BOOST_REGEX_CALL c_regex_traits<char>::init()
    if(entry_count == 0)
    {
       ctype_name = new std::string("xxxxxxxxxxxxxxxx");
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
          collate_name = new std::string("xxxxxxxxxxxxxxxx");
+         BOOST_REGEX_NOEH_ASSERT(collate_name)
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
       {
          delete ctype_name;
          throw;
       }
+#endif
    }
    re_message_init();
    re_init_classes();
@@ -763,14 +782,19 @@ void BOOST_REGEX_CALL c_regex_traits<wchar_t>::init()
    if(nlsw_count == 0)
    {
       wlocale_name = new std::string("xxxxxxxxxxxxxxxx");
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
          syntax = new std::list<syntax_map_t>();
+         BOOST_REGEX_NOEH_ASSERT(syntax)
+#ifndef BOOST_NO_EXCEPTIONS
       }
       catch(...)
       {
          delete wlocale_name;
          throw;
       }
+#endif
    }
    ++nlsw_count;
 }
diff --git a/src/cpp_regex_traits.cpp b/src/cpp_regex_traits.cpp
index de43207a..b42ced8d 100644
--- a/src/cpp_regex_traits.cpp
+++ b/src/cpp_regex_traits.cpp
@@ -197,11 +197,15 @@ message_data<char>::message_data(const std::locale& l, const std::string& regex_
    {
       pm = &BOOST_USE_FACET(std::messages<char>, l);
       cat = pm->open(regex_message_catalogue, l);
+#ifndef BOOST_NO_EXCEPTIONS
       if(cat < 0)
       {
          std::string m("Unable to open message catalog: ");
          throw std::runtime_error(m + regex_message_catalogue);
       }
+#else
+      BOOST_REGEX_NOEH_ASSERT(cat >= 0);
+#endif
    } 
 #endif
    std::memset(syntax_map, cpp_regex_traits<char>::syntax_char, 256);
@@ -296,14 +300,19 @@ cpp_regex_traits<char>::cpp_regex_traits()
 {
    pmd = new re_detail::message_data<char>(locale_inst, regex_message_cat);
    psyntax = pmd->syntax_map;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
       lower_map = new char[char_set_size];
+      BOOST_REGEX_NOEH_ASSERT(lower_map)
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
       delete pmd;
       throw;
    }
+#endif
    for(unsigned int i = 0; i < char_set_size; ++i)
       lower_map[i] = static_cast<char>(i);
    pctype = &BOOST_USE_FACET(std::ctype<char>, locale_inst);
@@ -565,11 +574,15 @@ message_data<wchar_t>::message_data(const std::locale& l, const std::string& reg
    if(regex_message_catalogue.size())
    {
       cat = msgs.open(regex_message_catalogue, l);
+#ifndef BOOST_NO_EXCEPTIONS
       if(cat < 0)
       {
          std::string m("Unable to open message catalog: ");
          throw std::runtime_error(m + regex_message_catalogue);
       }
+#else
+      BOOST_REGEX_NOEH_ASSERT(cat >= 0);
+#endif
    }
 #endif
    scoped_array<char> a;
@@ -770,14 +783,19 @@ cpp_regex_traits<wchar_t>::cpp_regex_traits()
 {
    pmd = new re_detail::message_data<wchar_t>(locale_inst, std::string(regex_message_cat));
    psyntax = pmd->syntax_;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
       lower_map = new wchar_t[char_set_size];
+      BOOST_REGEX_NOEH_ASSERT(lower_map)
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
       delete pmd;
       throw;
    }
+#endif
    for(unsigned int i = 0; i < char_set_size; ++i)
       lower_map[i] = static_cast<wchar_t>(i);
    pctype = &BOOST_USE_FACET(std::ctype<wchar_t>, locale_inst);
diff --git a/src/cregex.cpp b/src/cregex.cpp
index c39b8dc9..d9a54b47 100644
--- a/src/cregex.cpp
+++ b/src/cregex.cpp
@@ -178,6 +178,12 @@ unsigned int RegEx::SetExpression(const char* p, bool icase)
    return pdata->e.set_expression(p, f);
 }
 
+unsigned int RegEx::error_code()const
+{
+   return pdata->e.error_code();
+}
+
+
 std::string RegEx::Expression()const
 {
    BOOST_RE_GUARD_STACK
diff --git a/src/fileiter.cpp b/src/fileiter.cpp
index 3a4b9c86..ebe9a3a8 100644
--- a/src/fileiter.cpp
+++ b/src/fileiter.cpp
@@ -81,7 +81,11 @@ void mapfile::open(const char* file)
          CloseHandle(hfile);
          hmap = 0;
          hfile = 0;
+#ifndef BOOST_NO_EXCEPTIONS
          throw std::runtime_error("Unable to create file mapping.");
+#else
+         BOOST_REGEX_NOEH_ASSERT(hmap != INVALID_HANDLE_VALUE);
+#endif
       }
       _first = static_cast<const char*>(MapViewOfFile(hmap, FILE_MAP_READ, 0, 0, 0));
       if(_first == 0)
@@ -90,14 +94,22 @@ void mapfile::open(const char* file)
          CloseHandle(hfile);
          hmap = 0;
          hfile = 0;
+#ifndef BOOST_NO_EXCEPTIONS
          throw std::runtime_error("Unable to create file mapping.");
+#else
+         BOOST_REGEX_NOEH_ASSERT(_first != 0);
+#endif
       }
       _last = _first + GetFileSize(hfile, 0);
    }
    else
    {
       hfile = 0;
+#ifndef BOOST_NO_EXCEPTIONS
       throw std::runtime_error("Unable to open file.");
+#else
+      BOOST_REGEX_NOEH_ASSERT(hfile != INVALID_HANDLE_VALUE);
+#endif
    }
 }
 
@@ -285,7 +297,9 @@ void mapfile::open(const char* file)
 {
    BOOST_RE_GUARD_STACK
    hfile = std::fopen(file, "rb");
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    if(hfile != 0)
    {
       _size = get_file_length(hfile);
@@ -306,10 +320,16 @@ void mapfile::open(const char* file)
    }
    else
    {
+#ifndef BOOST_NO_EXCEPTIONS
        throw std::runtime_error("Unable to open file.");
+#else
+       BOOST_REGEX_NOEH_ASSERT(hfile != 0);
+#endif
    }
+#ifndef BOOST_NO_EXCEPTIONS
    }catch(...)
    { close(); throw; }
+#endif
 }
 
 void mapfile::close()
@@ -342,15 +362,21 @@ file_iterator::file_iterator()
    BOOST_RE_GUARD_STACK
    _root = _path = 0;
    ref = 0;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    _root = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_root)
    _path = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_path)
    ptr = _path;
    *_path = 0;
    *_root = 0;
    ref = new file_iterator_ref();
+   BOOST_REGEX_NOEH_ASSERT(ref)
    ref->hf = _fi_invalid_handle;
    ref->count = 1;
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
@@ -359,6 +385,7 @@ file_iterator::file_iterator()
       delete ref;
       throw;
    }
+#endif
 }
 
 file_iterator::file_iterator(const char* wild)
@@ -366,9 +393,13 @@ file_iterator::file_iterator(const char* wild)
    BOOST_RE_GUARD_STACK
    _root = _path = 0;
    ref = 0;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    _root = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_root)
    _path = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_path)
    std::strcpy(_root, wild);
    ptr = _root;
    while(*ptr)++ptr;
@@ -399,6 +430,7 @@ file_iterator::file_iterator(const char* wild)
    #endif
 
    ref = new file_iterator_ref();
+   BOOST_REGEX_NOEH_ASSERT(ref)
    ref->hf = FindFirstFileA(wild, &(ref->_data));
    ref->count = 1;
 
@@ -413,6 +445,7 @@ file_iterator::file_iterator(const char* wild)
       if(ref->_data.dwFileAttributes & _fi_dir)
          next();
    }
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
@@ -421,6 +454,7 @@ file_iterator::file_iterator(const char* wild)
       delete ref;
       throw;
    }
+#endif
 }
 
 file_iterator::file_iterator(const file_iterator& other)
@@ -428,13 +462,18 @@ file_iterator::file_iterator(const file_iterator& other)
    BOOST_RE_GUARD_STACK
    _root = _path = 0;
    ref = 0;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    _root = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_root)
    _path = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_path)
    std::strcpy(_root, other._root);
    std::strcpy(_path, other._path);
    ptr = _path + (other.ptr - other._path);
    ref = other.ref;
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
@@ -442,6 +481,7 @@ file_iterator::file_iterator(const file_iterator& other)
       delete[] _path;
       throw;
    }
+#endif
    ++(ref->count);
 }
 
@@ -517,15 +557,21 @@ directory_iterator::directory_iterator()
    BOOST_RE_GUARD_STACK
    _root = _path = 0;
    ref = 0;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    _root = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_root)
    _path = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_path)
    ptr = _path;
    *_path = 0;
    *_root = 0;
    ref = new file_iterator_ref();
+   BOOST_REGEX_NOEH_ASSERT(ref)
    ref->hf = _fi_invalid_handle;
    ref->count = 1;
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
@@ -534,6 +580,7 @@ directory_iterator::directory_iterator()
       delete ref;
       throw;
    }
+#endif
 }
 
 directory_iterator::directory_iterator(const char* wild)
@@ -541,9 +588,13 @@ directory_iterator::directory_iterator(const char* wild)
    BOOST_RE_GUARD_STACK
    _root = _path = 0;
    ref = 0;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    _root = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_root)
    _path = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_path)
    std::strcpy(_root, wild);
    ptr = _root;
    while(*ptr)++ptr;
@@ -573,6 +624,7 @@ directory_iterator::directory_iterator(const char* wild)
    }
    #endif
    ref = new file_iterator_ref();
+   BOOST_REGEX_NOEH_ASSERT(ref)
    ref->count = 1;
    ref->hf = FindFirstFileA(wild, &(ref->_data));
    if(ref->hf == _fi_invalid_handle)
@@ -586,6 +638,7 @@ directory_iterator::directory_iterator(const char* wild)
       if(((ref->_data.dwFileAttributes & _fi_dir) == 0) || (std::strcmp(ref->_data.cFileName, ".") == 0) || (std::strcmp(ref->_data.cFileName, "..") == 0))
          next();
    }
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
@@ -594,6 +647,7 @@ directory_iterator::directory_iterator(const char* wild)
       delete ref;
       throw;
    }
+#endif
 }
 
 directory_iterator::~directory_iterator()
@@ -614,13 +668,18 @@ directory_iterator::directory_iterator(const directory_iterator& other)
    BOOST_RE_GUARD_STACK
    _root = _path = 0;
    ref = 0;
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    _root = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_root)
    _path = new char[MAX_PATH];
+   BOOST_REGEX_NOEH_ASSERT(_path)
    std::strcpy(_root, other._root);
    std::strcpy(_path, other._path);
    ptr = _path + (other.ptr - other._path);
    ref = other.ref;
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(...)
    {
@@ -628,6 +687,7 @@ directory_iterator::directory_iterator(const directory_iterator& other)
       delete[] _path;
       throw;
    }
+#endif
    ++(ref->count);
 }
 
diff --git a/src/posix_api.cpp b/src/posix_api.cpp
index f64755a0..cd3dc0a2 100644
--- a/src/posix_api.cpp
+++ b/src/posix_api.cpp
@@ -43,12 +43,19 @@ BOOST_REGEX_DECL int BOOST_REGEX_CCALL regcompA(regex_tA* expression, const char
    if(expression->re_magic != magic_value)
    {
       expression->guts = 0;
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
       expression->guts = new regex();
+#ifndef BOOST_NO_EXCEPTIONS
       } catch(...)
       {
          return REG_ESPACE;
       }
+#else
+      if(0 == expression->guts)
+         return REG_E_MEMORY;
+#endif
    }
    // set default flags:
    boost::uint_fast32_t flags = (f & REG_EXTENDED) ? regbase::extended : regbase::basic;
@@ -77,15 +84,19 @@ BOOST_REGEX_DECL int BOOST_REGEX_CCALL regcompA(regex_tA* expression, const char
 
    int result;
 
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
       expression->re_magic = magic_value;
       static_cast<regex*>(expression->guts)->set_expression(ptr, p2, flags);
       expression->re_nsub = static_cast<regex*>(expression->guts)->mark_count() - 1;
       result = static_cast<regex*>(expression->guts)->error_code();
+#ifndef BOOST_NO_EXCEPTIONS
    } catch(...)
    {
       result = REG_E_UNKNOWN;
    }
+#endif
    if(result)
       regfreeA(expression);
    return result;
@@ -174,17 +185,21 @@ BOOST_REGEX_DECL int BOOST_REGEX_CCALL regexecA(const regex_tA* expression, cons
       end = buf + std::strlen(buf);
    }
 
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    if(expression->re_magic == magic_value)
    {
       result = regex_search(start, end, m, *static_cast<regex*>(expression->guts), flags);
    }
    else
       return result;
+#ifndef BOOST_NO_EXCEPTIONS
    } catch(...)
    {
       return REG_E_UNKNOWN;
    }
+#endif
 
    if(result)
    {
diff --git a/src/w32_regex_traits.cpp b/src/w32_regex_traits.cpp
index d43b1aa6..d1a5aa0d 100644
--- a/src/w32_regex_traits.cpp
+++ b/src/w32_regex_traits.cpp
@@ -236,11 +236,15 @@ void BOOST_REGEX_CALL w32_traits_base::do_init()
       if(*regex_message_catalogue)
       {
          hresmod = LoadLibraryA(regex_message_catalogue);
+#ifndef BOOST_NO_EXCEPTIONS
          if(hresmod == NULL)
          {
             std::string s("Unable to open dll: ");
             throw std::runtime_error(s + regex_message_catalogue);
          }
+#else
+         BOOST_REGEX_NOEH_ASSERT(hresmod != NULL);
+#endif
       }
       unsigned int i;
       for(i = 0; i < REG_E_UNKNOWN; ++i)
diff --git a/src/wide_posix_api.cpp b/src/wide_posix_api.cpp
index 7db03d6a..83dd7a03 100644
--- a/src/wide_posix_api.cpp
+++ b/src/wide_posix_api.cpp
@@ -51,12 +51,19 @@ BOOST_REGEX_DECL int BOOST_REGEX_CCALL regcompW(regex_tW* expression, const wcha
    if(expression->re_magic != wmagic_value)
    {
       expression->guts = 0;
+#ifndef BOOST_NO_EXCEPTIONS
       try{
+#endif
       expression->guts = new wregex();
+#ifndef BOOST_NO_EXCEPTIONS
       } catch(...)
       {
          return REG_ESPACE;
       }
+#else
+      if(0 == expression->guts)
+         return REG_E_MEMORY;
+#endif
    }
    // set default flags:
    boost::uint_fast32_t flags = (f & REG_EXTENDED) ? regbase::extended : regbase::basic;
@@ -85,15 +92,19 @@ BOOST_REGEX_DECL int BOOST_REGEX_CCALL regcompW(regex_tW* expression, const wcha
 
    int result;
 
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
       expression->re_magic = wmagic_value;
       static_cast<wregex*>(expression->guts)->set_expression(ptr, p2, flags);
       expression->re_nsub = static_cast<wregex*>(expression->guts)->mark_count() - 1;
       result = static_cast<wregex*>(expression->guts)->error_code();
+#ifndef BOOST_NO_EXCEPTIONS
    } catch(...)
    {
       result = REG_E_UNKNOWN;
    }
+#endif
    if(result)
       regfreeW(expression);
    return result;
@@ -182,18 +193,21 @@ BOOST_REGEX_DECL int BOOST_REGEX_CCALL regexecW(const regex_tW* expression, cons
       end = buf + std::wcslen(buf);
    }
 
+#ifndef BOOST_NO_EXCEPTIONS
    try{
+#endif
    if(expression->re_magic == wmagic_value)
    {
       result = regex_search(start, end, m, *static_cast<wregex*>(expression->guts), flags);
    }
    else
       return result;
+#ifndef BOOST_NO_EXCEPTIONS
    } catch(...)
    {
       return REG_E_UNKNOWN;
    }
-
+#endif
    if(result)
    {
       // extract what matched:
diff --git a/test/regress/tests.cpp b/test/regress/tests.cpp
index 559a2cc2..eebe543d 100644
--- a/test/regress/tests.cpp
+++ b/test/regress/tests.cpp
@@ -58,11 +58,14 @@ void cpp_eh_tests(const reg_expression<C, T, A>& )
 #ifndef __GNUC__
    bool thrown = false;
    // try set_expression form first:
+#ifndef BOOST_NO_EXCEPTIONS
    try
    {
+#endif
       A a;
       reg_expression<C, T, A> e(a);
       e.set_expression(expression.c_str(), flags[2] | regbase::use_except);
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(const boost::bad_expression&)
    {
@@ -74,14 +77,18 @@ void cpp_eh_tests(const reg_expression<C, T, A>& )
       begin_error();
       cout << "Error: expected exception not thrown" << endl;
    }
+#endif
 
    // now try constructor form:
    thrown = false;
+#ifndef BOOST_NO_EXCEPTIONS
    try
+#endif
    {
       A a;
       reg_expression<C, T, A> e(expression.c_str(), flags[2] | regbase::use_except, a);
    }
+#ifndef BOOST_NO_EXCEPTIONS
    catch(const boost::bad_expression&)
    {
       thrown = true;
@@ -93,6 +100,7 @@ void cpp_eh_tests(const reg_expression<C, T, A>& )
       cout << "Error: expected exception not thrown" << endl;
    }
 #endif
+#endif
 }
 
 template <class iterator>
@@ -515,6 +523,16 @@ void cpp_hl_tests(RegEx& e, bool recurse = true)
    if(flags[4] & REG_MERGE)
       return;
 
+   if(e.error_code())
+   {
+      if(search_text != BOOST_RE_STR("!"))
+      {
+         begin_error();
+         cout << "Expression did not compile with class RegEx" << endl;
+      }
+      return;
+   }
+
    if(recurse)
    {
       // copy and assign test:
@@ -611,13 +629,16 @@ void run_tests()
       return;
 #endif
 #ifndef NO_CPP_TEST
+#ifndef BOOST_NO_EXCEPTIONS
    try
    {
+#endif
       unsigned int f = flags[2] & ~regbase::use_except;
       if(flags[0] & REG_ICASE)
          f |= regbase::icase;
       re_type e(expression.c_str(), f);
       cpp_tests(e, true);
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(const std::exception& e)
    {
@@ -634,17 +655,21 @@ void run_tests()
       begin_error();
       cout << "Unexpected exception thrown from C++ library" << endl;
    }
+#endif // BOOST_NO_EXCEPTIONS
 #endif
 
 #if !defined(TEST_UNICODE)
+#ifndef BOOST_NO_EXCEPTIONS
    try
    {
+#endif
       if(((flags[3] & match_partial) == 0) && (flags[2] == regbase::normal) && (has_nulls(search_text.begin(), search_text.end()) == false))
       {
          RegEx e;
          e.SetExpression(expression.c_str(), flags[0] & REG_ICASE);
          cpp_hl_tests(e, true);
       }
+#ifndef BOOST_NO_EXCEPTIONS
    }
    catch(const std::exception& )
    {
@@ -659,6 +684,7 @@ void run_tests()
       begin_error();
       cout << "Unexpected exception thrown from RegEx::SetExpression" << endl;
    }
+#endif // BOOST_NO_EXCEPTIONS
 #endif
 
    if(flags[4] & (REG_NO_POSIX_TEST | REG_GREP | REG_MERGE | REG_MERGE_COPY))