diff --git a/src_main/containers/pimap.h b/src_main/containers/pimap.h
index a2c64fcd..a53c1a3d 100644
--- a/src_main/containers/pimap.h
+++ b/src_main/containers/pimap.h
@@ -197,6 +197,7 @@ public:
 	const T at(const Key & key) const {return (*this)[key];}
 	
 	PIMap<Key, T> & operator <<(const PIMap<Key, T> & other) {
+		if (&other == this) return *this;
 		if (other.isEmpty()) return *this;
 		if (other.size() == 1) {insert(other.pim_index[0].key, other.pim_content[0]); return *this;}
 		if (other.size() == 2) {insert(other.pim_index[0].key, other.pim_content[0]); insert(other.pim_index[1].key, other.pim_content[1]); return *this;}
diff --git a/src_main/core/piobject.cpp b/src_main/core/piobject.cpp
index c2d9d8ac..69e2af49 100755
--- a/src_main/core/piobject.cpp
+++ b/src_main/core/piobject.cpp
@@ -674,10 +674,10 @@ bool dumpApplicationToFile(const PIString & path) {
 
 
 
-void PIObject::__MetaData::addScope(const PIString & s) {
-	if (!scope_list.contains(s)) {
+void PIObject::__MetaData::addScope(const PIString & s, uint shash) {
+	if (!scope_id.contains(shash)) {
 		scope_list << s;
-		scope_id << s.hash();
+		scope_id << shash;
 	}
 }
 
diff --git a/src_main/core/piobject.h b/src_main/core/piobject.h
index 9269b043..5cd84ab2 100755
--- a/src_main/core/piobject.h
+++ b/src_main/core/piobject.h
@@ -195,12 +195,16 @@
 #endif
 #define __VVALUE(t, v) v.value< __PTYPE(t) >()
 
+//printf("base_init %s id=%d (%d) pid=%d (%d) ...\n", #name, id, eh.eh_func.size(), pid, ehp.eh_func.size());
+//printf("base_init %s id=%d (%d) pid=%d (%d) ok\n", #name, id, eh.eh_func.size(), pid, ehp.eh_func.size());
+//printf("parent_init %s::%s id=%d (%d) pid=%d (%d) ...\n", __classNameS().dataAscii(), #name, id, eh.eh_func.size(), pid, ehp.eh_func.size());
+//printf("parent_init %s::%s id=%d (%d) pid=%d (%d) ok\n", __classNameS().dataAscii(), #name, id, eh.eh_func.size(), pid, ehp.eh_func.size());
 
 #define PIOBJECT(name) \
 	protected: \
 	typedef name __PIObject__; \
 	public: \
-	static const PIString __classNameS() {return PIStringAscii(#name);} \
+	static const PIString __classNameS() {static PIString ret = PIStringAscii(#name); return ret;} \
 	static uint __classNameIDS() {static uint ret = PIStringAscii(#name).hash(); return ret;} \
 	virtual const char * className() const {return #name;} \
 	virtual uint classNameID() const {static uint ret = PIStringAscii(#name).hash(); return ret;} \
@@ -220,7 +224,7 @@
 			__MetaData & eh(__meta_data()[id]); \
 			eh.eh_set << ehp.eh_set; \
 			eh.eh_func << ehp.eh_func; \
-			eh.addScope(__classNameS()); \
+			eh.addScope(__classNameS(), id); \
 		} \
 	}; \
 	__BaseInitializer__ __base_init__;
@@ -239,8 +243,9 @@
 			__MetaData & ehp(__meta_data()[pid]); \
 			eh.eh_set << ehp.eh_set; \
 			eh.eh_func << ehp.eh_func; \
+			eh.scope_id = ehp.scope_id; \
 			eh.scope_list = ehp.scope_list; \
-			eh.addScope(__classNameS()); \
+			eh.addScope(PIStringAscii(#name), pid); \
 		} \
 	}; \
 	__ParentInitializer__ __parent_init__; \
@@ -836,8 +841,8 @@ public:
 		PIStringList names;
 	};
 	struct __MetaData {
-		__MetaData() {scope_list << PIStringAscii("PIObject");}
-		void addScope(const PIString & s);
+		__MetaData() {scope_list << PIStringAscii("PIObject"); scope_id << PIStringAscii("PIObject").hash();}
+		void addScope(const PIString & s, uint shash);
 		PIStringList scope_list;
 		PISet<uint> scope_id;
 		PISet<const void * > eh_set;
diff --git a/src_main/core/pistring.h b/src_main/core/pistring.h
index c0bf5cc7..a03a891f 100755
--- a/src_main/core/pistring.h
+++ b/src_main/core/pistring.h
@@ -869,10 +869,11 @@ public:
 	//! Compare operator
 	bool operator !=(const PIStringList & o) const {return !(o == (*this));}
 
-	PIStringList & operator =(const PIStringList & o) {clear(); for (uint i = 0; i < o.size(); ++i) *this << o[i]; return *this;}
+	//PIStringList & operator =(const PIStringList & o) {clear(); for (uint i = 0; i < o.size(); ++i) *this << o[i]; return *this;}
+	PIStringList & operator =(const PIStringList & o) {PIDeque<PIString>::operator=(o); return *this;}
 
-	PIStringList & operator <<(const PIString & str) {push_back(str); return *this;}
-	PIStringList & operator <<(const PIStringList & sl) {piForeachC (PIString & i, sl) push_back(i); return *this;}
+	PIStringList & operator <<(const PIString & str) {append(str); return *this;}
+	PIStringList & operator <<(const PIStringList & sl) {append(sl); return *this;}
 //	inline PIStringList & operator <<(const char c) {push_back(PIString(c)); return *this;}
 //	PIStringList & operator <<(const char * str) {push_back(PIString(str)); return *this;}
 //	PIStringList & operator <<(const int & num) {push_back(PIString::fromNumber(num)); return *this;}