diff --git a/DoRunner/JumpRuntimePointerRunner.cs b/DoRunner/JumpRuntimePointerRunner.cs
index 24475f8..61cf07c 100644
--- a/DoRunner/JumpRuntimePointerRunner.cs
+++ b/DoRunner/JumpRuntimePointerRunner.cs
@@ -1,4 +1,5 @@
 using Convention.RScript.Parser;
+using System;
 using System.Diagnostics.CodeAnalysis;
 
 namespace Convention.RScript.Runner
@@ -7,54 +8,51 @@ namespace Convention.RScript.Runner
     {
         protected static void DoJumpRuntimePointer(ExpressionParser parser, int target, RScriptContext context)
         {
+            int currentPointer = context.CurrentRuntimePointer;
             bool isForwardMove = target > context.CurrentRuntimePointer;
             int step = isForwardMove ? 1 : -1;
-            int insLayer = 0;
+            int depth = 0;
+            int lastLayer = 0;
             for (; context.CurrentRuntimePointer != target; context.CurrentRuntimePointer += step)
             {
                 if (context.CurrentSentence.mode == RScriptSentence.Mode.ExitNamespace)
                 {
                     if (isForwardMove)
-                    {
-                        if (insLayer > 0)
-                            insLayer--;
-                        else
-                        {
-                            for (int disLayer = -insLayer; disLayer > 0; disLayer--)
-                                context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
-                        }
-                    }
+                        lastLayer--;
                     else
-                        insLayer++;
+                        lastLayer++;
                 }
                 else if (context.CurrentSentence.mode == RScriptSentence.Mode.EnterNamespace)
                 {
                     if (isForwardMove)
-                        insLayer++;
+                        lastLayer++;
                     else
-                    {
-                        if (insLayer > 0)
-                            insLayer--;
-                        else
-                        {
-                            for (int disLayer = -insLayer; disLayer > 0; disLayer--)
-                                context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
-                        }
-                    }
+                        lastLayer--;
                 }
-                if (insLayer > 0)
+                depth = lastLayer < depth ? lastLayer : depth;
+            }
+            // 对上层的最深影响
+            for (; depth < 0; depth++)
+            {
+                try
                 {
-                    for (; insLayer > 0; insLayer--)
-                    {
-                        context.SentenceRunners[RScriptSentence.Mode.EnterNamespace].Run(parser, context.CurrentSentence, context);
-                    }
+                    context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
                 }
-                else if (insLayer < 0)
+                catch (Exception ex)
                 {
-                    for (; insLayer < 0; insLayer++)
-                    {
-                        context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
-                    }
+                    throw new RScriptRuntimeException($"Jump pointer with error", currentPointer, ex);
+                }
+            }
+            // 恢复正确的层数
+            for (int i = depth, e = lastLayer; i < e; i++)
+            {
+                try
+                {
+                    context.SentenceRunners[RScriptSentence.Mode.EnterNamespace].Run(parser, context.CurrentSentence, context);
+                }
+                catch (Exception ex)
+                {
+                    throw new RScriptRuntimeException($"Jump pointer with error", currentPointer, ex);
                 }
             }
         }