diff --git a/src/include/ranges/xindex.cc.h b/src/include/ranges/xindex.cc.h
index 73ac1f1..ec1575f 100644
--- a/src/include/ranges/xindex.cc.h
+++ b/src/include/ranges/xindex.cc.h
@@ -180,8 +180,10 @@ namespace CNORXZ
     template <class Index, typename Meta>
     DXpr<SizeT> XIndex<Index,Meta>::xpr(const XIndexPtr& _this) const
     {
+	CXZ_ERROR("IMPLEMENT!!!");
 	auto xthis = std::dynamic_pointer_cast<Index>(_this);
-	return DXpr<SizeT>( mI->xpr(xthis) );
+	//mI->xpr(xthis)
+	return DXpr<SizeT>(  );
     }
 
     template <class Index, typename Meta>
diff --git a/src/include/xpr/vpos_type.h b/src/include/xpr/vpos_type.h
index 861ad1d..064cb85 100644
--- a/src/include/xpr/vpos_type.h
+++ b/src/include/xpr/vpos_type.h
@@ -108,7 +108,7 @@ namespace CNORXZ
 	virtual Uptr<VPosBase> vexec(const VPosBase* a) const override final;
     };
 
-    
+    /*
     // defined as empty since they should never instanciated
     template <SizeT N>
     class VPos<SPos<N>>
@@ -118,7 +118,7 @@ namespace CNORXZ
     template <SizeT N>
     class VPosRef<SPos<N>>
     {};
-
+    */
     // defined as empty since they should never instanciated
     template <SizeT N, SizeT... Ms>
     class VPos<SFPos<N,Ms...>>
diff --git a/src/include/xpr/xpr_base.cc.h b/src/include/xpr/xpr_base.cc.h
index 71421c8..49585f9 100644
--- a/src/include/xpr/xpr_base.cc.h
+++ b/src/include/xpr/xpr_base.cc.h
@@ -33,9 +33,7 @@ namespace CNORXZ
     template <typename T, class Xpr>
     T VXpr<T,Xpr>::vexec() const
     {
-	CXZ_ERROR("IMPLEMENT!!!");
-	//(*this)();
-	return T();
+	return (*this)();
     }
     
     template <typename T, class Xpr>