diff --git a/NKC_WF/WebUserControls/cmp_stackLoading.ascx b/NKC_WF/WebUserControls/cmp_stackLoading.ascx
index d15e9f3..8c6bb4a 100644
--- a/NKC_WF/WebUserControls/cmp_stackLoading.ascx
+++ b/NKC_WF/WebUserControls/cmp_stackLoading.ascx
@@ -18,7 +18,6 @@
         <uc1:cmp_MachSelSmart runat="server" ID="cmp_MachSelSmart" />
     </div>
     <div class="col-12">
-        <asp:HiddenField ID="hfMachine" runat="server" />
         <asp:HiddenField ID="hfBarcode" runat="server" />
         <asp:HiddenField ID="hfEnableBCode" runat="server" />
         <asp:HiddenField ID="hfStackId" runat="server" />
@@ -54,7 +53,7 @@
         </asp:FormView>
         <asp:ObjectDataSource ID="ods" runat="server" OldValuesParameterFormatString="original_{0}" SelectMethod="getNextAvailable" TypeName="AppData.DS_AppTableAdapters.BatchListTableAdapter">
             <SelectParameters>
-                <asp:ControlParameter ControlID="hfMachine" DefaultValue="&quot;&quot;" Name="PlaceCod" PropertyName="Value" Type="String" />
+                <asp:QueryStringParameter DefaultValue="#" Name="PlaceCod" QueryStringField="mach" Type="String" />
             </SelectParameters>
         </asp:ObjectDataSource>
     </div>
diff --git a/NKC_WF/WebUserControls/cmp_stackLoading.ascx.cs b/NKC_WF/WebUserControls/cmp_stackLoading.ascx.cs
index 091a99e..964dc6f 100644
--- a/NKC_WF/WebUserControls/cmp_stackLoading.ascx.cs
+++ b/NKC_WF/WebUserControls/cmp_stackLoading.ascx.cs
@@ -99,8 +99,6 @@ namespace NKC_WF.WebUserControls
             set
             {
                 cmp_MachSelSmart.MachineSel = value;
-                hfMachine.Value = value;
-                frmView.DataBind();
             }
         }
 
@@ -351,7 +349,6 @@ namespace NKC_WF.WebUserControls
                     lastCmd = "";
                 }
                 cmp_stackNextloading.BatchId = BatchIdCurr;
-                MachineSel = "";
                 raiseEvent();
                 doUpdate();
             }
diff --git a/NKC_WF/WebUserControls/cmp_stackLoading.ascx.designer.cs b/NKC_WF/WebUserControls/cmp_stackLoading.ascx.designer.cs
index da92f69..8fa8f33 100644
--- a/NKC_WF/WebUserControls/cmp_stackLoading.ascx.designer.cs
+++ b/NKC_WF/WebUserControls/cmp_stackLoading.ascx.designer.cs
@@ -41,15 +41,6 @@ namespace NKC_WF.WebUserControls
         /// </remarks>
         protected global::NKC_WF.WebUserControls.cmp_MachSelSmart cmp_MachSelSmart;
 
-        /// <summary>
-        /// hfMachine control.
-        /// </summary>
-        /// <remarks>
-        /// Auto-generated field.
-        /// To modify move field declaration from designer file to code-behind file.
-        /// </remarks>
-        protected global::System.Web.UI.WebControls.HiddenField hfMachine;
-
         /// <summary>
         /// hfBarcode control.
         /// </summary>