diff --git a/MP.Mon/Pages/Index.razor.cs b/MP.Mon/Pages/Index.razor.cs
index 17c548b7..19aeb312 100644
--- a/MP.Mon/Pages/Index.razor.cs
+++ b/MP.Mon/Pages/Index.razor.cs
@@ -67,7 +67,7 @@ namespace MP.Mon.Pages
             {
                 int answ = 1;
                 int numElems = ListMSE != null ? ListMSE.Count : 1;
-                answ = (int)Math.Ceiling((double)numElems / mapNCol);
+                answ = (int)Math.Ceiling((double)numElems / maxCol);
                 return answ;
             }
         }