As suggested by AVS, I made CBonusYSstemNode noncopyable. However, it is copied somewhere in the code, but I can't find it with MVS:

http://stackoverflow.com/questions/3757219/how-to-locate-boostnoncopyable-errors

lib/HeroBonus.h

@@ -614,7 +614,7 @@ public:
 	const TBonusListPtr getSpellBonuses() const;
 };
 
-class DLL_LINKAGE CBonusSystemNode : public IBonusBearer
+class DLL_LINKAGE CBonusSystemNode : public IBonusBearer, public boost::noncopyable
 {
 public:
 	enum ENodeTypes