diff --git a/CSharp/App/Modules/Tree/BehaviorTreeViewModel.cs b/CSharp/App/Modules/Tree/BehaviorTreeViewModel.cs
index f21e135bbcfa85b447453804b2e323bb16e18bbd..8260d005a73522104ff43e694546189e6fb75c92 100644
--- a/CSharp/App/Modules/Tree/BehaviorTreeViewModel.cs
+++ b/CSharp/App/Modules/Tree/BehaviorTreeViewModel.cs
@@ -189,6 +189,10 @@ namespace Tree
 			byte[] bytes = File.ReadAllBytes(filePath);
 			var treeNodeDataArray = ProtobufHelper.FromBytes<TreeNodeDataArray>(bytes);
 			treeNodeDataArray.Init();
+			if (treeNodeDataArray.TreeNodeDatas.Count == 0)
+			{
+				return;
+			}
 			RecursionLoad(treeNodeDataArray, treeNodeDataArray.TreeNodeDatas[0], null);
 		}