diff --git a/lib/base/CMakeLists.txt b/lib/base/CMakeLists.txt
index fa79a8dc1..dedfb1587 100644
--- a/lib/base/CMakeLists.txt
+++ b/lib/base/CMakeLists.txt
@@ -24,7 +24,7 @@ mkclass_target(sysloglogger.ti sysloglogger.thpp)
 
 set(base_SOURCES
   application.cpp application.thpp array.cpp context.cpp
-  convert.cpp dictionary.cpp dynamicobject.cpp dynamicobject.thpp dynamictype.cpp
+  convert.cpp debuginfo.cpp dictionary.cpp dynamicobject.cpp dynamicobject.thpp dynamictype.cpp
   exception.cpp fifo.cpp filelogger.cpp filelogger.thpp logger.cpp logger.thpp
   netstring.cpp networkstream.cpp object.cpp objectlock.cpp process.cpp
   qstring.cpp ringbuffer.cpp scriptfunction.cpp scriptfunctionwrapper.cpp
diff --git a/lib/base/application.cpp b/lib/base/application.cpp
index 0264f7324..8d5365bc7 100644
--- a/lib/base/application.cpp
+++ b/lib/base/application.cpp
@@ -50,6 +50,7 @@ bool Application::m_RequestRestart = false;
 bool Application::m_RequestReopenLogs = false;
 pid_t Application::m_ReloadProcess = 0;
 static bool l_Restarting = false;
+static bool l_InExceptionHandler = false;
 int Application::m_ArgC;
 char **Application::m_ArgV;
 double Application::m_StartTime;
@@ -578,6 +579,12 @@ BOOL WINAPI Application::CtrlHandler(DWORD type)
  */
 void Application::ExceptionHandler(void)
 {
+	if (l_InExceptionHandler)
+		for (;;)
+			Utility::Sleep(5);
+
+	l_InExceptionHandler = true;
+
 #ifndef _WIN32
 	struct sigaction sa;
 	memset(&sa, 0, sizeof(sa));
@@ -607,6 +614,11 @@ void Application::ExceptionHandler(void)
 #ifdef _WIN32
 LONG CALLBACK Application::SEHUnhandledExceptionFilter(PEXCEPTION_POINTERS exi)
 {
+	if (l_InExceptionHandler)
+		return EXCEPTION_CONTINUE_SEARCH;
+
+	l_InExceptionHandler = true;
+
 	DisplayInfoMessage();
 
 	std::cerr << "Caught unhandled SEH exception." << std::endl
diff --git a/lib/config/debuginfo.cpp b/lib/base/debuginfo.cpp
similarity index 93%
rename from lib/config/debuginfo.cpp
rename to lib/base/debuginfo.cpp
index 1fbbe8ba7..3b4cec312 100644
--- a/lib/config/debuginfo.cpp
+++ b/lib/base/debuginfo.cpp
@@ -17,7 +17,7 @@
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  ******************************************************************************/
 
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 #include "base/convert.hpp"
 #include <fstream>
 
@@ -107,3 +107,12 @@ void icinga::ShowCodeFragment(std::ostream& out, const DebugInfo& di, bool verbo
 		}
 	}
 }
+
+std::string icinga::to_string(const errinfo_debuginfo& e)
+{
+	std::ostringstream msgbuf;
+	msgbuf << "Config location: " << e.value() << "\n";
+	ShowCodeFragment(msgbuf, e.value(), true);
+	return msgbuf.str();
+}
+
diff --git a/lib/config/debuginfo.hpp b/lib/base/debuginfo.hpp
similarity index 79%
rename from lib/config/debuginfo.hpp
rename to lib/base/debuginfo.hpp
index 84c97e74d..9162fb968 100644
--- a/lib/config/debuginfo.hpp
+++ b/lib/base/debuginfo.hpp
@@ -20,8 +20,9 @@
 #ifndef DEBUGINFO_H
 #define DEBUGINFO_H
 
-#include "config/i2-config.hpp"
+#include "base/i2-base.hpp"
 #include "base/qstring.hpp"
+#include "base/exception.hpp"
 
 namespace icinga
 {
@@ -60,11 +61,16 @@ struct DebugInfo
 	};
 };
 
-I2_CONFIG_API std::ostream& operator<<(std::ostream& out, const DebugInfo& val);
+I2_BASE_API std::ostream& operator<<(std::ostream& out, const DebugInfo& val);
 
-I2_CONFIG_API DebugInfo DebugInfoRange(const DebugInfo& start, const DebugInfo& end);
+I2_BASE_API DebugInfo DebugInfoRange(const DebugInfo& start, const DebugInfo& end);
 
-I2_CONFIG_API void ShowCodeFragment(std::ostream& out, const DebugInfo& di, bool verbose);
+I2_BASE_API void ShowCodeFragment(std::ostream& out, const DebugInfo& di, bool verbose);
+
+struct errinfo_debuginfo_;
+typedef boost::error_info<struct errinfo_debuginfo_, DebugInfo> errinfo_debuginfo;
+
+std::string to_string(const errinfo_debuginfo& e);
 
 }
 
diff --git a/lib/base/dynamicobject.cpp b/lib/base/dynamicobject.cpp
index c56e0c5a4..0d6ac6629 100644
--- a/lib/base/dynamicobject.cpp
+++ b/lib/base/dynamicobject.cpp
@@ -54,6 +54,16 @@ DynamicType::Ptr DynamicObject::GetType(void) const
 	return DynamicType::GetByName(GetTypeName());
 }
 
+DebugInfo DynamicObject::GetDebugInfo(void) const
+{
+	return m_DebugInfo;
+}
+
+void DynamicObject::SetDebugInfo(const DebugInfo& di)
+{
+	m_DebugInfo = di;
+}
+
 bool DynamicObject::IsActive(void) const
 {
 	return GetActive();
diff --git a/lib/base/dynamicobject.hpp b/lib/base/dynamicobject.hpp
index fabf34b9b..1b64b0d2c 100644
--- a/lib/base/dynamicobject.hpp
+++ b/lib/base/dynamicobject.hpp
@@ -25,6 +25,7 @@
 #include "base/object.hpp"
 #include "base/serializer.hpp"
 #include "base/dictionary.hpp"
+#include "base/debuginfo.hpp"
 #include <boost/signals2.hpp>
 #include <map>
 
@@ -53,6 +54,9 @@ public:
 
 	shared_ptr<DynamicType> GetType(void) const;
 
+	DebugInfo GetDebugInfo(void) const;
+	void SetDebugInfo(const DebugInfo& di);
+
 	bool IsActive(void) const;
 	bool IsPaused(void) const;
 
@@ -93,6 +97,8 @@ protected:
 private:
 	static DynamicObject::Ptr GetObject(const String& type, const String& name);
 	static void RestoreObject(const String& message, int attributeTypes);
+
+	DebugInfo m_DebugInfo;
 };
 
 #define DECLARE_TYPENAME(klass)						\
diff --git a/lib/base/dynamictype.cpp b/lib/base/dynamictype.cpp
index 219dfcc18..57a09639a 100644
--- a/lib/base/dynamictype.cpp
+++ b/lib/base/dynamictype.cpp
@@ -21,6 +21,7 @@
 #include "base/serializer.hpp"
 #include "base/debug.hpp"
 #include "base/objectlock.hpp"
+#include "base/convert.hpp"
 
 using namespace icinga;
 
@@ -99,7 +100,9 @@ void DynamicType::RegisterObject(const DynamicObject::Ptr& object)
 			if (it->second == object)
 				return;
 
-			BOOST_THROW_EXCEPTION(std::runtime_error("RegisterObject() found existing object with the same name: " + name));
+			BOOST_THROW_EXCEPTION(user_error("An object with type '" + m_Name + "' and name '" + name + "' already exists (" +
+			    Convert::ToString(it->second->GetDebugInfo()) + "), new declaration: " + Convert::ToString(object->GetDebugInfo()))
+			    << errinfo_debuginfo(object->GetDebugInfo()));
 		}
 
 		m_ObjectMap[name] = object;
diff --git a/lib/base/exception.cpp b/lib/base/exception.cpp
index a2a9c6a9b..f809dbe3d 100644
--- a/lib/base/exception.cpp
+++ b/lib/base/exception.cpp
@@ -153,3 +153,18 @@ String icinga::DiagnosticInformation(boost::exception_ptr eptr)
 	return boost::diagnostic_information(eptr);
 }
 
+user_error::user_error(void)
+{ }
+
+user_error::user_error(const String& message)
+	: m_Message(message)
+{ }
+
+user_error::~user_error(void) throw()
+{ }
+
+const char *user_error::what(void) const throw()
+{
+	return m_Message.CStr();
+}
+
diff --git a/lib/base/exception.hpp b/lib/base/exception.hpp
index dbbb1906c..c47ce34d7 100644
--- a/lib/base/exception.hpp
+++ b/lib/base/exception.hpp
@@ -38,7 +38,17 @@
 namespace icinga
 {
 
-class I2_BASE_API user_error : virtual public std::exception, virtual public boost::exception { };
+class I2_BASE_API user_error : virtual public std::exception, virtual public boost::exception {
+public:
+	user_error(void);
+	user_error(const String& message);
+	~user_error(void) throw();
+
+	const char *what(void) const throw();
+
+private:
+	String m_Message;
+};
 
 I2_BASE_API StackTrace *GetLastExceptionStack(void);
 I2_BASE_API void SetLastExceptionStack(const StackTrace& trace);
diff --git a/lib/config/CMakeLists.txt b/lib/config/CMakeLists.txt
index a44254061..db582cbe3 100644
--- a/lib/config/CMakeLists.txt
+++ b/lib/config/CMakeLists.txt
@@ -34,7 +34,7 @@ set(config_SOURCES
   aexpression.cpp applyrule.cpp base-type.conf base-type.cpp
   configcompilercontext.cpp configcompiler.cpp configerror.cpp configitembuilder.cpp
   configitem.cpp ${FLEX_config_lexer_OUTPUTS} ${BISON_config_parser_OUTPUTS}
-  configtype.cpp debuginfo.cpp objectrule.cpp typerule.cpp typerulelist.cpp
+  configtype.cpp objectrule.cpp typerule.cpp typerulelist.cpp
 )
 
 if(ICINGA2_UNITY_BUILD)
diff --git a/lib/config/aexpression.hpp b/lib/config/aexpression.hpp
index 8a416c4a7..0e2f97c22 100644
--- a/lib/config/aexpression.hpp
+++ b/lib/config/aexpression.hpp
@@ -21,7 +21,7 @@
 #define AEXPRESSION_H
 
 #include "config/i2-config.hpp"
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 #include "base/array.hpp"
 #include "base/dictionary.hpp"
 
diff --git a/lib/config/applyrule.hpp b/lib/config/applyrule.hpp
index b6fc6088c..147298c9f 100644
--- a/lib/config/applyrule.hpp
+++ b/lib/config/applyrule.hpp
@@ -22,7 +22,7 @@
 
 #include "config/i2-config.hpp"
 #include "config/aexpression.hpp"
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 #include <boost/function.hpp>
 
 namespace icinga
diff --git a/lib/config/configcompiler.hpp b/lib/config/configcompiler.hpp
index 69557b797..3d1968bdb 100644
--- a/lib/config/configcompiler.hpp
+++ b/lib/config/configcompiler.hpp
@@ -21,7 +21,7 @@
 #define CONFIGCOMPILER_H
 
 #include "config/i2-config.hpp"
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 #include "base/registry.hpp"
 #include "base/initialize.hpp"
 #include "base/singleton.hpp"
diff --git a/lib/config/configcompilercontext.hpp b/lib/config/configcompilercontext.hpp
index 22f611287..2a3401e0c 100644
--- a/lib/config/configcompilercontext.hpp
+++ b/lib/config/configcompilercontext.hpp
@@ -21,7 +21,7 @@
 #define CONFIGCOMPILERCONTEXT_H
 
 #include "config/i2-config.hpp"
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 #include <boost/thread/mutex.hpp>
 #include <vector>
 
diff --git a/lib/config/configerror.cpp b/lib/config/configerror.cpp
index 845f359b6..453cae65e 100644
--- a/lib/config/configerror.cpp
+++ b/lib/config/configerror.cpp
@@ -23,21 +23,6 @@
 using namespace icinga;
 
 ConfigError::ConfigError(const String& message)
-	: m_Message(message)
+	: user_error(message)
 { }
 
-ConfigError::~ConfigError(void) throw()
-{ }
-
-const char *ConfigError::what(void) const throw()
-{
-	return m_Message.CStr();
-}
-
-std::string icinga::to_string(const errinfo_debuginfo& e)
-{
-	std::ostringstream msgbuf;
-	msgbuf << "Config location: " << e.value() << "\n";
-	ShowCodeFragment(msgbuf, e.value(), true);
-	return msgbuf.str();
-}
diff --git a/lib/config/configerror.hpp b/lib/config/configerror.hpp
index dc085c00d..f389b9b11 100644
--- a/lib/config/configerror.hpp
+++ b/lib/config/configerror.hpp
@@ -21,7 +21,7 @@
 #define CONFIGERROR_H
 
 #include "config/i2-config.hpp"
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 #include "base/exception.hpp"
 
 namespace icinga
@@ -34,19 +34,8 @@ class I2_CONFIG_API ConfigError : virtual public user_error
 {
 public:
 	ConfigError(const String& message);
-	~ConfigError(void) throw();
-
-	const char *what(void) const throw();
-
-private:
-	String m_Message;
 };
 
-struct errinfo_debuginfo_;
-typedef boost::error_info<struct errinfo_debuginfo_, DebugInfo> errinfo_debuginfo;
-
-std::string to_string(const errinfo_debuginfo& e);
-
 }
 
 #endif /* CONFIGERROR_H */
diff --git a/lib/config/configitem.cpp b/lib/config/configitem.cpp
index 61bc1cb0a..6de092d48 100644
--- a/lib/config/configitem.cpp
+++ b/lib/config/configitem.cpp
@@ -22,6 +22,7 @@
 #include "config/applyrule.hpp"
 #include "config/objectrule.hpp"
 #include "config/configtype.hpp"
+#include "config/configerror.hpp"
 #include "base/application.hpp"
 #include "base/dynamictype.hpp"
 #include "base/objectlock.hpp"
@@ -180,9 +181,6 @@ DynamicObject::Ptr ConfigItem::Commit(void)
 	if (!dtype)
 		BOOST_THROW_EXCEPTION(std::runtime_error("Type '" + GetType() + "' does not exist."));
 
-	if (dtype->GetObject(GetName()))
-	    BOOST_THROW_EXCEPTION(std::runtime_error("An object with type '" + GetType() + "' and name '" + GetName() + "' already exists."));
-
 	if (IsAbstract())
 		return DynamicObject::Ptr();
 
@@ -195,6 +193,7 @@ DynamicObject::Ptr ConfigItem::Commit(void)
 	}
 
 	DynamicObject::Ptr dobj = dtype->CreateObject(properties);
+	dobj->SetDebugInfo(m_DebugInfo);
 	dobj->Register();
 
 	m_Object = dobj;
diff --git a/lib/config/configitembuilder.hpp b/lib/config/configitembuilder.hpp
index 9c9a2a842..f53fb7b7c 100644
--- a/lib/config/configitembuilder.hpp
+++ b/lib/config/configitembuilder.hpp
@@ -20,9 +20,9 @@
 #ifndef CONFIGITEMBUILDER_H
 #define CONFIGITEMBUILDER_H
 
-#include "config/debuginfo.hpp"
 #include "config/aexpression.hpp"
 #include "config/configitem.hpp"
+#include "base/debuginfo.hpp"
 #include "base/object.hpp"
 
 namespace icinga
diff --git a/lib/config/objectrule.hpp b/lib/config/objectrule.hpp
index 6098fb60a..f3ed2505c 100644
--- a/lib/config/objectrule.hpp
+++ b/lib/config/objectrule.hpp
@@ -22,7 +22,7 @@
 
 #include "config/i2-config.hpp"
 #include "config/aexpression.hpp"
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 #include "base/dynamictype.hpp"
 
 namespace icinga
diff --git a/lib/config/typerule.hpp b/lib/config/typerule.hpp
index 8a1ab737e..2e6ece95a 100644
--- a/lib/config/typerule.hpp
+++ b/lib/config/typerule.hpp
@@ -22,7 +22,7 @@
 
 #include "config/i2-config.hpp"
 #include "config/typerulelist.hpp"
-#include "config/debuginfo.hpp"
+#include "base/debuginfo.hpp"
 
 namespace icinga
 {