diff --git a/core/BehaviorTree.go b/core/BehaviorTree.go
index c0ca7d3..3b193f6 100644
--- a/core/BehaviorTree.go
+++ b/core/BehaviorTree.go
@@ -147,7 +147,7 @@ func (this *BehaviorTree) SetDebug(debug interface{}) {
 	this.debug = debug
 }
 
-func  (this *BehaviorTree) GetRoot() IBaseNode {
+func (this *BehaviorTree) GetRoot() IBaseNode {
 	return this.root
 }
 
@@ -295,10 +295,21 @@ func (this *BehaviorTree) Tick(target interface{}, blackboard *Blackboard) b3.St
 	var currOpenNodes []IBaseNode
 	currOpenNodes = append(currOpenNodes, tick._openNodes...)
 
+	var same bool
+	l := len(lastOpenNodes)
+	if l == len(currOpenNodes) {
+		if l == 0 || lastOpenNodes[l-1] == currOpenNodes[l-1] {
+			same = true
+		}
+	}
+	if same {
+		return state
+	}
+
 	// does not close if it is still open in this tick
 	var start = 0
 	for i := 0; i < b3.MinInt(len(lastOpenNodes), len(currOpenNodes)); i++ {
-		start = i + 1
+		start = i
 		if lastOpenNodes[i] != currOpenNodes[i] {
 			break
 		}
diff --git a/examples/testwork/README.md b/examples/testwork/README.md
new file mode 100644
index 0000000..445a2bd
--- /dev/null
+++ b/examples/testwork/README.md
@@ -0,0 +1,119 @@
+# 修正第一个记忆节点无法关闭示例
+关联问题https://github.com/magicsea/behavior3go/issues/17 。  
+追踪原版的老bug，记忆节点链关闭的第一个会执行不了onclose，导致memseq节点会错误的记录runningChild不清理。   
+错误表现为，因为runningChild没重置，直接从Wait0-2跳入Wait1-2。   
+### 修复方法 
+start=i+1改start，增加same判断是否调用链修改了（不判断会导致一直在running节点）。   
+
+### 修复前后日志
+重现需开打Wait节点的print日志。
+- 修复前日志
+```
+logtest: <nil> job 0-0
+wait: Wait0-1 <milliseconds>ms <nil> => 0
+wait: Wait0-1 <milliseconds>ms <nil> => 108
+wait: Wait0-1 <milliseconds>ms <nil> => 216
+wait: Wait0-1 <milliseconds>ms <nil> => 325
+wait: Wait0-1 <milliseconds>ms <nil> => 434
+wait: Wait0-1 <milliseconds>ms <nil> => 542
+wait: Wait0-1 <milliseconds>ms <nil> => 652
+wait: Wait0-1 <milliseconds>ms <nil> => 759
+wait: Wait0-1 <milliseconds>ms <nil> => 869
+wait: Wait0-1 <milliseconds>ms <nil> => 978
+wait: Wait0-1 <milliseconds>ms <nil> => 1087
+logtest: <nil> job 0-1
+logtest: <nil> job 0-2
+wait: Wait0-2 <milliseconds>ms <nil> => 0
+wait: Wait0-2 <milliseconds>ms <nil> => 109
+logtest: <nil> job 1-0
+wait: Wait1-1 <milliseconds>ms <nil> => 0
+wait: Wait1-1 <milliseconds>ms <nil> => 111
+wait: Wait1-1 <milliseconds>ms <nil> => 221
+wait: Wait1-1 <milliseconds>ms <nil> => 331
+wait: Wait1-1 <milliseconds>ms <nil> => 442
+wait: Wait1-1 <milliseconds>ms <nil> => 551
+wait: Wait1-1 <milliseconds>ms <nil> => 662
+wait: Wait1-1 <milliseconds>ms <nil> => 771
+wait: Wait1-1 <milliseconds>ms <nil> => 880
+wait: Wait1-1 <milliseconds>ms <nil> => 991
+wait: Wait1-1 <milliseconds>ms <nil> => 1098
+logtest: <nil> job 1-1
+logtest: <nil> job 1-2
+wait: Wait1-2 <milliseconds>ms <nil> => 0
+logtest: <nil> job 0-0
+wait: Wait0-1 <milliseconds>ms <nil> => 0
+wait: Wait0-1 <milliseconds>ms <nil> => 109
+wait: Wait0-1 <milliseconds>ms <nil> => 219
+wait: Wait0-1 <milliseconds>ms <nil> => 329
+wait: Wait0-1 <milliseconds>ms <nil> => 438
+wait: Wait0-1 <milliseconds>ms <nil> => 545
+wait: Wait0-1 <milliseconds>ms <nil> => 652
+wait: Wait0-1 <milliseconds>ms <nil> => 760
+wait: Wait0-1 <milliseconds>ms <nil> => 869
+wait: Wait0-1 <milliseconds>ms <nil> => 976
+wait: Wait0-1 <milliseconds>ms <nil> => 1084
+logtest: <nil> job 0-1
+logtest: <nil> job 0-2
+wait: Wait0-2 <milliseconds>ms <nil> => 0
+wait: Wait0-2 <milliseconds>ms <nil> => 108
+wait: Wait1-2 <milliseconds>ms <nil> => 0<--------------------错误行,应该进入：job 1-0
+wait: Wait1-2 <milliseconds>ms <nil> => 107
+logtest: <nil> job 1-0
+wait: Wait1-1 <milliseconds>ms <nil> => 0
+wait: Wait1-1 <milliseconds>ms <nil> => 108
+wait: Wait1-1 <milliseconds>ms <nil> => 216
+
+
+```
+
+- 修复后日志
+```
+logtest: <nil> job 0-0
+wait: Wait0-1 <milliseconds>ms <nil> => 0
+wait: Wait0-1 <milliseconds>ms <nil> => 110
+wait: Wait0-1 <milliseconds>ms <nil> => 217
+wait: Wait0-1 <milliseconds>ms <nil> => 327
+wait: Wait0-1 <milliseconds>ms <nil> => 437
+wait: Wait0-1 <milliseconds>ms <nil> => 545
+wait: Wait0-1 <milliseconds>ms <nil> => 653
+wait: Wait0-1 <milliseconds>ms <nil> => 763
+wait: Wait0-1 <milliseconds>ms <nil> => 872
+wait: Wait0-1 <milliseconds>ms <nil> => 980
+wait: Wait0-1 <milliseconds>ms <nil> => 1088
+logtest: <nil> job 0-1
+logtest: <nil> job 0-2
+wait: Wait0-2 <milliseconds>ms <nil> => 0
+wait: Wait0-2 <milliseconds>ms <nil> => 109
+logtest: <nil> job 1-0
+wait: Wait1-1 <milliseconds>ms <nil> => 0
+wait: Wait1-1 <milliseconds>ms <nil> => 109
+wait: Wait1-1 <milliseconds>ms <nil> => 219
+wait: Wait1-1 <milliseconds>ms <nil> => 328
+wait: Wait1-1 <milliseconds>ms <nil> => 436
+wait: Wait1-1 <milliseconds>ms <nil> => 545
+wait: Wait1-1 <milliseconds>ms <nil> => 652
+wait: Wait1-1 <milliseconds>ms <nil> => 759
+wait: Wait1-1 <milliseconds>ms <nil> => 868
+wait: Wait1-1 <milliseconds>ms <nil> => 976
+wait: Wait1-1 <milliseconds>ms <nil> => 1085
+logtest: <nil> job 1-1
+logtest: <nil> job 1-2
+wait: Wait1-2 <milliseconds>ms <nil> => 0
+logtest: <nil> job 0-0
+wait: Wait0-1 <milliseconds>ms <nil> => 753
+wait: Wait0-1 <milliseconds>ms <nil> => 861
+wait: Wait0-1 <milliseconds>ms <nil> => 967
+wait: Wait0-1 <milliseconds>ms <nil> => 1075
+logtest: <nil> job 0-1
+logtest: <nil> job 0-2
+wait: Wait0-2 <milliseconds>ms <nil> => 0
+wait: Wait0-2 <milliseconds>ms <nil> => 109
+<---------------------------------------------------------------------正确切换到1-0
+logtest: <nil> job 1-0
+wait: Wait1-1 <milliseconds>ms <nil> => 0
+wait: Wait1-1 <milliseconds>ms <nil> => 108
+wait: Wait1-1 <milliseconds>ms <nil> => 217
+wait: Wait1-1 <milliseconds>ms <nil> => 325
+wait: Wait1-1 <milliseconds>ms <nil> => 433
+
+```
\ No newline at end of file
diff --git a/examples/testwork/main.go b/examples/testwork/main.go
new file mode 100644
index 0000000..c4a0c5d
--- /dev/null
+++ b/examples/testwork/main.go
@@ -0,0 +1,63 @@
+/*
+从原生工程文件加载
+*/
+package main
+
+import (
+	"fmt"
+	b3 "github.com/magicsea/behavior3go"
+	. "github.com/magicsea/behavior3go/config"
+	. "github.com/magicsea/behavior3go/core"
+	. "github.com/magicsea/behavior3go/examples/share"
+	. "github.com/magicsea/behavior3go/loader"
+	"sync"
+	"time"
+)
+
+// 所有的树管理
+var mapTreesByID = sync.Map{}
+var maps = b3.NewRegisterStructMaps()
+
+func init() {
+	//自定义节点注册
+	maps.Register("Log", new(LogTest))
+	maps.Register("SetValue", new(SetValue))
+	maps.Register("IsValue", new(IsValue))
+
+	//获取子树的方法
+	SetSubTreeLoadFunc(func(id string) *BehaviorTree {
+		//println("==>load subtree:",id)
+		t, ok := mapTreesByID.Load(id)
+		if ok {
+			return t.(*BehaviorTree)
+		}
+		return nil
+	})
+}
+
+func main() {
+	projectConfig, ok := LoadRawProjectCfg("testwork.b3")
+	if !ok {
+		fmt.Println("LoadRawProjectCfg err")
+		return
+	}
+
+	var firstTree *BehaviorTree
+	//载入
+	for _, v := range projectConfig.Data.Trees {
+		tree := CreateBevTreeFromConfig(&v, maps)
+		tree.Print()
+		mapTreesByID.Store(v.ID, tree)
+		if firstTree == nil {
+			firstTree = tree
+		}
+	}
+	time.Sleep(time.Second)
+	//输入板
+	board := NewBlackboard()
+	//循环每一帧
+	for i := 0; i < 40; i++ {
+		firstTree.Tick(i, board)
+		time.Sleep(time.Millisecond * 100)
+	}
+}
diff --git a/examples/testwork/testwork.b3 b/examples/testwork/testwork.b3
new file mode 100644
index 0000000..fc46d10
--- /dev/null
+++ b/examples/testwork/testwork.b3
@@ -0,0 +1,329 @@
+{
+  "name": "testwork",
+  "description": "",
+  "data": {
+    "version": "0.3.0",
+    "scope": "project",
+    "selectedTree": "9e6f6cb9-d3d2-41af-9d03-3ab247d42be7",
+    "trees": [
+      {
+        "version": "0.3.0",
+        "scope": "tree",
+        "id": "9e6f6cb9-d3d2-41af-9d03-3ab247d42be7",
+        "title": "A behavior tree",
+        "description": "",
+        "root": "7656895d-d268-4252-81bc-e0cd013add4b",
+        "properties": {},
+        "nodes": {
+          "197a07a2-1444-4088-8dd9-509d5208c6e8": {
+            "id": "197a07a2-1444-4088-8dd9-509d5208c6e8",
+            "name": "MemSequence",
+            "category": "composite",
+            "title": "MemSequence1",
+            "description": "",
+            "properties": {},
+            "display": {
+              "x": 240,
+              "y": 60
+            },
+            "children": [
+              "9fbbec3b-3f57-4fa9-8800-021859a5baf1",
+              "866d2e78-120e-446e-8e87-3dfc93eed895",
+              "f54a5051-b8ba-4296-958b-99f0da7f5c0f",
+              "5dad8fe4-3d34-4a75-a82e-ac4aa3a33c3f",
+              "93c25ee3-7dda-41e6-92a0-a9c2302c6d91",
+              "819cd7d8-eed8-4294-bacd-e6cdfe04fcbc",
+              "17c2e7c4-d571-4772-8e8b-79045a9125d3"
+            ]
+          },
+          "42f24b36-88a5-4c20-b8c7-0579145cb71c": {
+            "id": "42f24b36-88a5-4c20-b8c7-0579145cb71c",
+            "name": "MemSequence",
+            "category": "composite",
+            "title": "MemSequence2",
+            "description": "",
+            "properties": {},
+            "display": {
+              "x": 228,
+              "y": 396
+            },
+            "children": [
+              "4cfaf27e-dfab-4a4d-85eb-e6fe6d66fc50",
+              "25305166-3936-4270-8d0f-3dd99e2986ed",
+              "a64f52c1-385d-4381-9c51-3b3c9509648f",
+              "970dce20-6cff-4515-8a3c-a969c13ca984",
+              "fd916444-28dc-4448-9039-1b6f009ee8aa",
+              "db67a446-51ef-4d61-8e3a-b214a34b691f",
+              "0acaa9c4-384b-478e-be04-556351cca31c"
+            ]
+          },
+          "7656895d-d268-4252-81bc-e0cd013add4b": {
+            "id": "7656895d-d268-4252-81bc-e0cd013add4b",
+            "name": "Priority",
+            "category": "composite",
+            "title": "Priority",
+            "description": "",
+            "properties": {},
+            "display": {
+              "x": 96,
+              "y": 216
+            },
+            "children": [
+              "197a07a2-1444-4088-8dd9-509d5208c6e8",
+              "42f24b36-88a5-4c20-b8c7-0579145cb71c"
+            ]
+          },
+          "f54a5051-b8ba-4296-958b-99f0da7f5c0f": {
+            "id": "f54a5051-b8ba-4296-958b-99f0da7f5c0f",
+            "name": "Wait",
+            "category": "action",
+            "title": "Wait0-1 <milliseconds>ms",
+            "description": "",
+            "properties": {
+              "milliseconds": 1000
+            },
+            "display": {
+              "x": 468,
+              "y": 60
+            }
+          },
+          "a64f52c1-385d-4381-9c51-3b3c9509648f": {
+            "id": "a64f52c1-385d-4381-9c51-3b3c9509648f",
+            "name": "Wait",
+            "category": "action",
+            "title": "Wait1-1 <milliseconds>ms",
+            "description": "",
+            "properties": {
+              "milliseconds": 1000
+            },
+            "display": {
+              "x": 456,
+              "y": 396
+            }
+          },
+          "93c25ee3-7dda-41e6-92a0-a9c2302c6d91": {
+            "id": "93c25ee3-7dda-41e6-92a0-a9c2302c6d91",
+            "name": "SetValue",
+            "category": "action",
+            "title": "SetValue(<key>,<value>)1",
+            "description": "",
+            "properties": {
+              "key": "job",
+              "value": 1
+            },
+            "display": {
+              "x": 468,
+              "y": 144
+            }
+          },
+          "fd916444-28dc-4448-9039-1b6f009ee8aa": {
+            "id": "fd916444-28dc-4448-9039-1b6f009ee8aa",
+            "name": "SetValue",
+            "category": "action",
+            "title": "SetValue(<key>,<value>)2",
+            "description": "",
+            "properties": {
+              "key": "job",
+              "value": 0
+            },
+            "display": {
+              "x": 456,
+              "y": 492
+            }
+          },
+          "9fbbec3b-3f57-4fa9-8800-021859a5baf1": {
+            "id": "9fbbec3b-3f57-4fa9-8800-021859a5baf1",
+            "name": "IsValue",
+            "category": "condition",
+            "title": "IsValue(<key>,<value>)1",
+            "description": "",
+            "properties": {
+              "key": "job",
+              "value": 0
+            },
+            "display": {
+              "x": 468,
+              "y": -36
+            }
+          },
+          "4cfaf27e-dfab-4a4d-85eb-e6fe6d66fc50": {
+            "id": "4cfaf27e-dfab-4a4d-85eb-e6fe6d66fc50",
+            "name": "IsValue",
+            "category": "condition",
+            "title": "IsValue(<key>,<value>)2",
+            "description": "",
+            "properties": {
+              "key": "job",
+              "value": 1
+            },
+            "display": {
+              "x": 456,
+              "y": 300
+            }
+          },
+          "866d2e78-120e-446e-8e87-3dfc93eed895": {
+            "id": "866d2e78-120e-446e-8e87-3dfc93eed895",
+            "name": "Log",
+            "category": "action",
+            "title": "Log(<info>)",
+            "description": "",
+            "properties": {
+              "info": "job 0-0"
+            },
+            "display": {
+              "x": 468,
+              "y": 12
+            }
+          },
+          "5dad8fe4-3d34-4a75-a82e-ac4aa3a33c3f": {
+            "id": "5dad8fe4-3d34-4a75-a82e-ac4aa3a33c3f",
+            "name": "Log",
+            "category": "action",
+            "title": "Log(<info>)",
+            "description": "",
+            "properties": {
+              "info": "job 0-1"
+            },
+            "display": {
+              "x": 468,
+              "y": 96
+            }
+          },
+          "819cd7d8-eed8-4294-bacd-e6cdfe04fcbc": {
+            "id": "819cd7d8-eed8-4294-bacd-e6cdfe04fcbc",
+            "name": "Log",
+            "category": "action",
+            "title": "Log(<info>)",
+            "description": "",
+            "properties": {
+              "info": "job 0-2"
+            },
+            "display": {
+              "x": 468,
+              "y": 192
+            }
+          },
+          "25305166-3936-4270-8d0f-3dd99e2986ed": {
+            "id": "25305166-3936-4270-8d0f-3dd99e2986ed",
+            "name": "Log",
+            "category": "action",
+            "title": "Log(<info>)",
+            "description": "",
+            "properties": {
+              "info": "job 1-0"
+            },
+            "display": {
+              "x": 456,
+              "y": 348
+            }
+          },
+          "970dce20-6cff-4515-8a3c-a969c13ca984": {
+            "id": "970dce20-6cff-4515-8a3c-a969c13ca984",
+            "name": "Log",
+            "category": "action",
+            "title": "Log(<info>)",
+            "description": "",
+            "properties": {
+              "info": "job 1-1"
+            },
+            "display": {
+              "x": 456,
+              "y": 444
+            }
+          },
+          "db67a446-51ef-4d61-8e3a-b214a34b691f": {
+            "id": "db67a446-51ef-4d61-8e3a-b214a34b691f",
+            "name": "Log",
+            "category": "action",
+            "title": "Log(<info>)",
+            "description": "",
+            "properties": {
+              "info": "job 1-2"
+            },
+            "display": {
+              "x": 456,
+              "y": 540
+            }
+          },
+          "17c2e7c4-d571-4772-8e8b-79045a9125d3": {
+            "id": "17c2e7c4-d571-4772-8e8b-79045a9125d3",
+            "name": "Wait",
+            "category": "action",
+            "title": "Wait0-2 <milliseconds>ms",
+            "description": "",
+            "properties": {
+              "milliseconds": 100
+            },
+            "display": {
+              "x": 468,
+              "y": 240
+            }
+          },
+          "0acaa9c4-384b-478e-be04-556351cca31c": {
+            "id": "0acaa9c4-384b-478e-be04-556351cca31c",
+            "name": "Wait",
+            "category": "action",
+            "title": "Wait1-2 <milliseconds>ms",
+            "description": "",
+            "properties": {
+              "milliseconds": 100
+            },
+            "display": {
+              "x": 456,
+              "y": 588
+            }
+          }
+        },
+        "display": {
+          "camera_x": 540,
+          "camera_y": 306.5,
+          "camera_z": 1,
+          "x": -12,
+          "y": 216
+        }
+      }
+    ],
+    "custom_nodes": [
+      {
+        "version": "0.3.0",
+        "scope": "node",
+        "name": "SetValue",
+        "category": "action",
+        "title": "SetValue(<key>,<value>)",
+        "description": null,
+        "properties": {
+          "key": "string",
+          "value": 1
+        },
+        "parent": null
+      },
+      {
+        "version": "0.3.0",
+        "scope": "node",
+        "name": "IsValue",
+        "category": "condition",
+        "title": "IsValue(<key>,<value>)",
+        "description": null,
+        "properties": {
+          "key": "string",
+          "value": 1
+        },
+        "parent": null
+      },
+      {
+        "version": "0.3.0",
+        "scope": "node",
+        "name": "Log",
+        "category": "action",
+        "title": "Log(<info>)",
+        "description": null,
+        "properties": {
+          "info": "string"
+        },
+        "parent": null
+      }
+    ],
+    "custom_folders": []
+  },
+  "path": "E:\\mgame\\server\\mgameserver.git\\src\\lib\\behavior3go\\examples\\testwork\\testwork.b3"
+}
\ No newline at end of file