diff --git a/Step.NC/NcHandler.cs b/Step.NC/NcHandler.cs
index fd947082..63dbfcff 100644
--- a/Step.NC/NcHandler.cs
+++ b/Step.NC/NcHandler.cs
@@ -2426,7 +2426,7 @@ namespace Step.NC
                 //  Cycle through elements, use the max number of elements between layer components in order to be optimized
                 for (int i = 0; i < GetMaxCountBetweenLayerComponents(layer); i++)
                 {
-                    if (layer.Buttons.ElementAt(i) != null)
+                    if (layer.Buttons.ElementAtOrDefault(i) != null)
                     {
                         // Read enabled from PLC
                         cmsError = numericalControl.PLC_RScadaValue(layer.Buttons[i].Status.MemEnabledIndex, SCADA_MEM_TYPE.BOOL, ref val);
@@ -2440,7 +2440,7 @@ namespace Step.NC
                         });
                     }
                     
-                    if (layer.Images.ElementAt(i) != null)
+                    if (layer.Images.ElementAtOrDefault(i) != null)
                     {
                         // Read isVisible from PLC
                         cmsError = numericalControl.PLC_RScadaValue(layer.Images[i].Status.MemVisibleIndex, SCADA_MEM_TYPE.BOOL, ref val);
@@ -2454,7 +2454,7 @@ namespace Step.NC
                         });
                     }
 
-                    if (layer.ProgressBars.ElementAt(i) != null)
+                    if (layer.ProgressBars.ElementAtOrDefault(i) != null)
                     {
                         // Read value from PLC
                         cmsError = numericalControl.PLC_RScadaValue(layer.ProgressBars[i].MemValueIndex, SCADA_MEM_TYPE.BYTE, ref val);
@@ -2468,7 +2468,7 @@ namespace Step.NC
                         });
                     }
 
-                    if (layer.Inputs.ElementAt(i) != null && layer.Inputs[i].Status.Action == "read")
+                    if (layer.Inputs.ElementAtOrDefault(i) != null && layer.Inputs[i].Status.Action == "read")
                     {
                         // Read isVisible from PLC
                         cmsError = numericalControl.PLC_RScadaValue(layer.Inputs[i].Status.MemEnabledIndex, SCADA_MEM_TYPE.BOOL, ref val);