diff --git a/SOURCE/Plugin/DeviceDescription.cs b/SOURCE/Plugin/DeviceDescription.cs
index 84a0fc1..8c75e10 100644
--- a/SOURCE/Plugin/DeviceDescription.cs
+++ b/SOURCE/Plugin/DeviceDescription.cs
@@ -1873,7 +1873,7 @@ namespace Aml.Editor.Plugin
                             IEnumerable<PackagePart> rootParts = amlx.GetPartsByRelationShipType(AutomationMLContainer.RelationshipType.Root);
 
                             // We expect the aml to only have one root part
-                            if (rootParts.First() != null)
+                            if (rootParts.Count() != 0 && rootParts.First() != null)
                             {
 
                                 PackagePart part = rootParts.First();
@@ -4496,7 +4496,7 @@ namespace Aml.Editor.Plugin
             }
             else
             {
-                this.advancedModeToolStripMenuItem.Text = "Expert mode";
+                this.advancedModeToolStripMenuItem.Text = "Advanced mode";
             }
 
             // Show/hide elements