diff --git a/ZCppMain/ZMainHead.H b/ZCppMain/ZMainHead.H
index 1c1a757..fd57171 100644
--- a/ZCppMain/ZMainHead.H
+++ b/ZCppMain/ZMainHead.H
@@ -7148,6 +7148,9 @@ namespace ZNsMain
         {
             // 다음 링크와 위치를 맞바꾼다.
 
+            if(IsEmpty()){return *this;}
+
+
             ZCLink* VP_LinkNext = AR_LinkPrev.mp_NextLink;
 
             if(&AR_LinkPrev == VP_LinkNext){ return *this; }