diff --git a/include/SWI-Prolog.h b/include/SWI-Prolog.h
index 3eb92156e..d6f4e1749 100755
--- a/include/SWI-Prolog.h
+++ b/include/SWI-Prolog.h
@@ -683,6 +683,36 @@ PL_EXPORT(LRESULT)	PL_win_message_proc(HWND hwnd,
 
 X_API intptr_t		PL_query(int);	/* get information from Prolog */
 
+		 /*******************************
+		 *	      ERRORS		*
+		 *******************************/
+
+PL_EXPORT(int) 		PL_get_atom_ex(term_t t, atom_t *a);
+PL_EXPORT(int) 		PL_get_integer_ex(term_t t, int *i);
+PL_EXPORT(int) 		PL_get_long_ex(term_t t, long *i);
+PL_EXPORT(int) 		PL_get_int64_ex(term_t t, int64_t *i);
+PL_EXPORT(int) 		PL_get_intptr_ex(term_t t, intptr_t *i);
+PL_EXPORT(int) 		PL_get_size_ex(term_t t, size_t *i);
+PL_EXPORT(int) 		PL_get_bool_ex(term_t t, int *i);
+PL_EXPORT(int) 		PL_get_float_ex(term_t t, double *f);
+PL_EXPORT(int) 		PL_get_char_ex(term_t t, int *p, int eof);
+PL_EXPORT(int) 		PL_unify_bool_ex(term_t t, int val);
+PL_EXPORT(int) 		PL_get_pointer_ex(term_t t, void **addrp);
+PL_EXPORT(int) 		PL_unify_list_ex(term_t l, term_t h, term_t t);
+PL_EXPORT(int) 		PL_unify_nil_ex(term_t l);
+PL_EXPORT(int) 		PL_get_list_ex(term_t l, term_t h, term_t t);
+PL_EXPORT(int) 		PL_get_nil_ex(term_t l);
+
+PL_EXPORT(int)		PL_instantiation_error(term_t culprit);
+PL_EXPORT(int)		PL_representation_error(const char *resource);
+PL_EXPORT(int)		PL_type_error(const char *expected, term_t culprit);
+PL_EXPORT(int)		PL_domain_error(const char *expected, term_t culprit);
+PL_EXPORT(int)		PL_existence_error(const char *type, term_t culprit);
+PL_EXPORT(int)		PL_permission_error(const char *operation,
+					    const char *type, term_t culprit);
+PL_EXPORT(int)		PL_resource_error(const char *resource);
+
+
 		 /*******************************
 		 *	       BLOBS		*
 		 *******************************/
diff --git a/packages/PLStream/pl-error.c b/packages/PLStream/pl-error.c
index a15da7b3d..2055e1daa 100644
--- a/packages/PLStream/pl-error.c
+++ b/packages/PLStream/pl-error.c
@@ -184,6 +184,76 @@ PL_unify_bool_ex(term_t t, bool val)
   return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_bool, t);
 }
 
+		 /*******************************
+		 *	  TYPICAL ERRORS	*
+		 *******************************/
+
+int
+PL_instantiation_error(term_t actual)
+{ return PL_error(NULL, 0, NULL, ERR_INSTANTIATION);
+}
+
+int
+PL_representation_error(const char *resource)
+{ atom_t r = PL_new_atom(resource);
+  int rc = PL_error(NULL, 0, NULL, ERR_RESOURCE, r);
+  PL_unregister_atom(r);
+
+  return rc;
+}
+
+
+int
+PL_type_error(const char *expected, term_t actual)
+{ return PL_error(NULL, 0, NULL, ERR_CHARS_TYPE, expected, actual);
+}
+
+
+int
+PL_domain_error(const char *expected, term_t actual)
+{ atom_t a = PL_new_atom(expected);
+  int rc = PL_error(NULL, 0, NULL, ERR_DOMAIN, a, actual);
+  PL_unregister_atom(a);
+
+  return rc;
+}
+
+
+int
+PL_existence_error(const char *type, term_t actual)
+{ atom_t a = PL_new_atom(type);
+  int rc = PL_error(NULL, 0, NULL, ERR_EXISTENCE, a, actual);
+  PL_unregister_atom(a);
+
+  return rc;
+}
+
+
+int
+PL_permission_error(const char *op, const char *type, term_t obj)
+{ atom_t t = PL_new_atom(type);
+  atom_t o = PL_new_atom(op);
+  int rc = PL_error(NULL, 0, NULL, ERR_PERMISSION, o, t, obj);
+
+  PL_unregister_atom(t);
+  PL_unregister_atom(o);
+
+  return rc;
+}
+
+
+int
+PL_resource_error(const char *resource)
+{ atom_t r = PL_new_atom(resource);
+  int rc = PL_error(NULL, 0, NULL, ERR_RESOURCE, r);
+
+  PL_unregister_atom(r);
+
+  return rc;
+}
+
+
+
 word
 notImplemented(char *name, int arity)
 { return (word)PL_error(NULL, 0, NULL, ERR_NOT_IMPLEMENTED_PROC, name, arity);