diff --git a/server/mt-server.cc b/server/mt-server.cc
index ab57780..4bf7041 100644
--- a/server/mt-server.cc
+++ b/server/mt-server.cc
@@ -42,10 +42,31 @@ In<PEP_SESSION>::~In()
 	// no automatic release!
 }
 
+
+// in pEpEngine.h positive values are hex, negative are decimal. :-o
+std::string status_to_string(PEP_STATUS status)
+{
+	if(status==PEP_STATUS_OK)
+		return "PEP_STATUS_OK";
+	
+	std::stringstream ss;
+	if(status>0)
+	{
+		ss << "0x" << std::hex << status;
+	}else{
+		ss << status;
+	}
+	return ss.str();
+}
+
 PEP_SESSION createSession()
 {
 	PEP_SESSION session = nullptr;
-	init(&session);
+	auto ret = init(&session);
+	if(ret != PEP_STATUS_OK)
+	{
+		throw std::runtime_error("createSession() failed because pEp's init() returns " + status_to_string(ret) );
+	}
 	return session;
 }
 
diff --git a/server/registry.hh b/server/registry.hh
index 1dae8a9..f8f594d 100644
--- a/server/registry.hh
+++ b/server/registry.hh
@@ -76,7 +76,7 @@ public:
 		if(ret.second == false)
 		{
 			d(rsrc);
-			throw std::runtime_error("Duplicate entry");
+			throw std::runtime_error("Duplicate entry: id=" + std::to_string(id) + ", rsrc=" + std::to_string( intptr_t(rsrc) ) );
 		}
 		return id;
 	}