diff --git a/ZCppMain/ZMainHead.H b/ZCppMain/ZMainHead.H
index 94c27f2..ef73ceb 100644
--- a/ZCppMain/ZMainHead.H
+++ b/ZCppMain/ZMainHead.H
@@ -5857,10 +5857,12 @@ namespace ZNsMain
 
             ZCLinkPoint& operator= (const ZCLinkPoint& rhs){ return *this; }
 
+
             /***/ TypeData&    operator*()      {return **mp_CurrLink;}
             const TypeData&    operator*() const{return **mp_CurrLink;}
 
-            ZCLinkPoint& operator++() const
+
+            const ZCLinkPoint& operator++() const
             {
                 if(IsEmpty()){return *this;}
 
@@ -5870,9 +5872,9 @@ namespace ZNsMain
                     { ml_CurrPos -= mr_CurrList.size(); }
                 return *this; /*******************/
             }/*
-            ZCLinkPoint& operator++() const*/
+            const ZCLinkPoint& operator++() const*/
 
-            ZCLinkPoint& operator--() const
+            const ZCLinkPoint& operator--() const
             {
                 if(IsEmpty()){return *this;}
 
@@ -5882,7 +5884,7 @@ namespace ZNsMain
                     { ml_CurrPos += mr_CurrList.size(); }
                 return *this;
             }/*
-            ZCLinkPoint& operator--() const*/
+            const ZCLinkPoint& operator--() const*/
 
             ZCLinkPoint  operator++(int) const
             {
@@ -5913,7 +5915,7 @@ namespace ZNsMain
             ZCLinkPoint  operator--(int) const*/
 
 
-            ZCLinkPoint& operator+=(TypeSize AL_Distance) const
+            const ZCLinkPoint& operator+=(TypeSize AL_Distance) const
             {
                 if(IsEmpty()){return *this;}
 
@@ -5925,9 +5927,9 @@ namespace ZNsMain
                     { while(ml_CurrPos+= mr_CurrList.size()<1){} }
                 return *this; /**********************/
             }/*
-            ZCLinkPoint& operator+=(TypeSize AL_Distance) const*/
+            const ZCLinkPoint& operator+=(TypeSize AL_Distance) const*/
 
-            ZCLinkPoint& operator-=(TypeSize AL_Distance) const
+            const ZCLinkPoint& operator-=(TypeSize AL_Distance) const
             {
                 if(IsEmpty()){return *this;}
 
@@ -5939,7 +5941,7 @@ namespace ZNsMain
                     { while(ml_CurrPos+= mr_CurrList.size()<1){} }
                 return *this; /***********************/
             }/*
-            ZCLinkPoint& operator-=(TypeSize AL_Distance) const*/
+            const ZCLinkPoint& operator-=(TypeSize AL_Distance) const*/
 
         public:
         };/*