diff --git a/src/core/tango/DevFailed/lut_DevFailed.cpp b/src/core/tango/DevFailed/lut_DevFailed.cpp
index fa47395..6a0accf 100644
--- a/src/core/tango/DevFailed/lut_DevFailed.cpp
+++ b/src/core/tango/DevFailed/lut_DevFailed.cpp
@@ -3,12 +3,15 @@
 int lut_DevFailed(lua_State* L, Tango::DevFailed e, const char* source)
 {
 	int nerr = e.errors.length(); 
-	lua_createtable(L, nerr, 1);
+	lua_createtable(L, nerr, 2);
 	int top = lua_gettop(L);
 
 	lua_pushstring(L, source);
 	lua_setfield(L, -2, "source");
 
+	lua_pushboolean(L, true);
+	lua_setfield(L, -2, "is_DevFailed");
+
 	for(int i = 0; i < nerr; i++)
 	{
 		lua_pushnumber(L, i+1);
diff --git a/src/core/tango/DeviceProxy/lut_DeviceProxy.h b/src/core/tango/DeviceProxy/lut_DeviceProxy.h
index 057febf..041640c 100644
--- a/src/core/tango/DeviceProxy/lut_DeviceProxy.h
+++ b/src/core/tango/DeviceProxy/lut_DeviceProxy.h
@@ -35,7 +35,6 @@ int cmd_wrapper(lua_State* L);
 int lut_DeviceProxy_status(lua_State* L);
 int lut_DeviceProxy_get_attribute_list(lua_State* L);
 int lut_DeviceProxy_get_command_list(lua_State* L);
-int lut_DeviceProxy_command_wrapper(lua_State* L);
 
 // Lua API
 void lut_lua_register_DeviceProxy(lua_State* L);
diff --git a/src/try.lua b/src/try.lua
index b2c58d9..09ad3ac 100644
--- a/src/try.lua
+++ b/src/try.lua
@@ -2,12 +2,16 @@ local log = require "lutango.lutLog"
 
 local function default_handler(e)
 	io.stderr:write("\n=================================== EXCEPTION ===================================\n")
-	io.stderr:write("Tango Error Stack:\t"..e.source.."\n")
-	for i,v in ipairs(e) do
-		io.stderr:write("\t"..i..":\n")
-		io.stderr:write("\t\t"..v.severity.."\t\t"..v.reason.."\n")
-		io.stderr:write("\t\t"..v.desc.."\n")
-		io.stderr:write("\t\t"..v.origin.."\n\n")
+	if e.is_DevFailed then
+		io.stderr:write("Tango Error Stack:\t"..e.source.."\n")
+		for i,v in ipairs(e) do
+			io.stderr:write("\t"..i..":\n")
+			io.stderr:write("\t\t"..v.severity.."\t\t"..v.reason.."\n")
+			io.stderr:write("\t\t"..v.desc.."\n")
+			io.stderr:write("\t\t"..v.origin.."\n\n")
+		end
+	else
+		io.stderr:write(tostring(e))
 	end
 	io.stderr:write(debug.traceback("", 6))
 	io.stderr:write("\n=================================================================================\n\n")