diff --git a/MFCCreoDll.cpp b/MFCCreoDll.cpp
index 5ee4eab..3d4d21d 100644
--- a/MFCCreoDll.cpp
+++ b/MFCCreoDll.cpp
@@ -31,13 +31,14 @@ static UINT_PTR timer_id = 0;
 
 // 无锁消息队列项
 struct MessageItem {
-    std::string type;           // "SHOW_MESSAGE", "OPEN_MODEL_REQUEST", 或 "SHRINKWRAP_SHELL_REQUEST"
+    std::string type;           // "SHOW_MESSAGE", "OPEN_MODEL_REQUEST", "SHRINKWRAP_SHELL_REQUEST", 或 "TIMEOUT_CLEANUP"
     std::string data;           // 消息内容或文件路径或JSON数据
     std::string extra;          // 额外参数（如open_mode）
     volatile bool completed;    // 完成标志
+    volatile bool timed_out;    // 超时标志，用于指示HTTP请求已超时返回
     void* result_ptr;          // 结果指针
     
-    MessageItem() : completed(false), result_ptr(nullptr) {}
+    MessageItem() : completed(false), timed_out(false), result_ptr(nullptr) {}
 };
 
 // 无锁同步机制
@@ -123,6 +124,15 @@ VOID CALLBACK TimerProc(HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime)
                 // 执行Shrinkwrap处理
                 HttpResponse response = ShellExportHandler::HandleShrinkwrapShellRequest(shrinkwrap_request);
                 
+                // 检查是否已超时，若超时则清理内存并跳过
+                if (item->timed_out) {
+                    // HTTP请求已超时返回，清理堆分配的MessageItem
+                    delete item;
+                    pending_message_item = nullptr;
+                    has_pending_item = false;
+                    return; // 直接返回，不设置completed
+                }
+                
                 // 保存结果
                 item->result_ptr = new HttpResponse(response);
                 item->completed = true;
@@ -1624,7 +1634,7 @@ HttpResponse ShrinkwrapShellHandler(const HttpRequest& request) {
     
     try {
         // 解析请求获取超时参数
-        int timeout_seconds = 30; // 默认值
+        int timeout_seconds = 60; // 默认值改为60秒
         try {
             // 简单解析JSON获取timeout_seconds
             std::string json_body = request.body;
@@ -1639,33 +1649,37 @@ HttpResponse ShrinkwrapShellHandler(const HttpRequest& request) {
             }
         } catch (...) {
             // 解析失败，使用默认值
-            timeout_seconds = 30;
+            timeout_seconds = 60;
         }
         
-        // 使用无锁消息机制
-        MessageItem shrinkwrap_message_item;
-        shrinkwrap_message_item.type = "SHRINKWRAP_SHELL_REQUEST";
-        shrinkwrap_message_item.data = request.body;
+        // 使用堆分配的MessageItem，避免超时后悬空指针问题
+        MessageItem* shrinkwrap_message_item = new MessageItem();
+        shrinkwrap_message_item->type = "SHRINKWRAP_SHELL_REQUEST";
+        shrinkwrap_message_item->data = request.body;
         
         // 原子设置（无锁）
-        pending_message_item = &shrinkwrap_message_item;
+        pending_message_item = shrinkwrap_message_item;
         has_pending_item = true;
         
         // 等待主线程完成操作（带动态超时）
         int timeout_ms = timeout_seconds * 1000; // 转换为毫秒
-        while (!shrinkwrap_message_item.completed && timeout_ms > 0) {
+        while (!shrinkwrap_message_item->completed && timeout_ms > 0) {
             Sleep(100); // 稍长的间隔，因为Shrinkwrap是重操作
             timeout_ms -= 100;
         }
         
-        if (shrinkwrap_message_item.completed && shrinkwrap_message_item.result_ptr) {
-            HttpResponse result = *static_cast<HttpResponse*>(shrinkwrap_message_item.result_ptr);
-            delete static_cast<HttpResponse*>(shrinkwrap_message_item.result_ptr); // 清理内存
+        if (shrinkwrap_message_item->completed && shrinkwrap_message_item->result_ptr) {
+            // 操作成功完成
+            HttpResponse result = *static_cast<HttpResponse*>(shrinkwrap_message_item->result_ptr);
+            delete static_cast<HttpResponse*>(shrinkwrap_message_item->result_ptr); // 清理结果内存
+            delete shrinkwrap_message_item; // 清理MessageItem内存
             return result;
         } else {
-            // 超时处理
+            // 超时处理：标记为已超时，让TimerProc负责清理
+            shrinkwrap_message_item->timed_out = true;
             response.status_code = 504;
-            response.body = "{\"success\": false, \"error\": \"Operation timeout: Shrinkwrap export exceeded " + std::to_string(timeout_seconds) + " seconds limit\"}";
+            response.body = "{\"success\": false, \"error\": \"Operation timeout: Shrinkwrap export exceeded " 
+                + std::to_string(timeout_seconds) + " seconds limit\", \"note\": \"The Creo operation may still complete in background. Check Creo for results.\"}";
             return response;
         }
         
diff --git a/MFCCreoDll.vcxproj b/MFCCreoDll.vcxproj
index e971379..405f740 100644
--- a/MFCCreoDll.vcxproj
+++ b/MFCCreoDll.vcxproj
@@ -96,6 +96,7 @@
       <PreprocessorDefinitions>_WINDOWS;_USRDLL;USE_ANSI_IOSTREAMS;PRO_USE_VAR_ARGS;PRO_MACHINE=36;HYCOMMONWINAPI_EXPORTS;_WIN32_WINNT=0x0601;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
diff --git a/MFCCreoDll/x64/Debug/AuthManager.obj b/MFCCreoDll/x64/Debug/AuthManager.obj
index c61f49a..28c4ecc 100644
Binary files a/MFCCreoDll/x64/Debug/AuthManager.obj and b/MFCCreoDll/x64/Debug/AuthManager.obj differ
diff --git a/MFCCreoDll/x64/Debug/BatchOperationManager.obj b/MFCCreoDll/x64/Debug/BatchOperationManager.obj
index 8b787ae..f3264d9 100644
Binary files a/MFCCreoDll/x64/Debug/BatchOperationManager.obj and b/MFCCreoDll/x64/Debug/BatchOperationManager.obj differ
diff --git a/MFCCreoDll/x64/Debug/CodeAnalysisResultManifest.txt b/MFCCreoDll/x64/Debug/CodeAnalysisResultManifest.txt
deleted file mode 100644
index 06a9a80..0000000
Binary files a/MFCCreoDll/x64/Debug/CodeAnalysisResultManifest.txt and /dev/null differ
diff --git a/MFCCreoDll/x64/Debug/ComponentChildrenManager.obj b/MFCCreoDll/x64/Debug/ComponentChildrenManager.obj
index 6e43620..c2e2914 100644
Binary files a/MFCCreoDll/x64/Debug/ComponentChildrenManager.obj and b/MFCCreoDll/x64/Debug/ComponentChildrenManager.obj differ
diff --git a/MFCCreoDll/x64/Debug/CreoManager.obj b/MFCCreoDll/x64/Debug/CreoManager.obj
index 6beeb92..a1b192a 100644
Binary files a/MFCCreoDll/x64/Debug/CreoManager.obj and b/MFCCreoDll/x64/Debug/CreoManager.obj differ
diff --git a/MFCCreoDll/x64/Debug/CreoUtilities.obj b/MFCCreoDll/x64/Debug/CreoUtilities.obj
index a1ac9c9..c5e5cab 100644
Binary files a/MFCCreoDll/x64/Debug/CreoUtilities.obj and b/MFCCreoDll/x64/Debug/CreoUtilities.obj differ
diff --git a/MFCCreoDll/x64/Debug/GeometryAnalyzer.obj b/MFCCreoDll/x64/Debug/GeometryAnalyzer.obj
index 8347005..948d96f 100644
Binary files a/MFCCreoDll/x64/Debug/GeometryAnalyzer.obj and b/MFCCreoDll/x64/Debug/GeometryAnalyzer.obj differ
diff --git a/MFCCreoDll/x64/Debug/HierarchyStatisticsAnalyzer.obj b/MFCCreoDll/x64/Debug/HierarchyStatisticsAnalyzer.obj
index 8cc1e21..e7e3b6c 100644
Binary files a/MFCCreoDll/x64/Debug/HierarchyStatisticsAnalyzer.obj and b/MFCCreoDll/x64/Debug/HierarchyStatisticsAnalyzer.obj differ
diff --git a/MFCCreoDll/x64/Debug/HttpRouter.obj b/MFCCreoDll/x64/Debug/HttpRouter.obj
index 11f78e9..b2a6fa0 100644
Binary files a/MFCCreoDll/x64/Debug/HttpRouter.obj and b/MFCCreoDll/x64/Debug/HttpRouter.obj differ
diff --git a/MFCCreoDll/x64/Debug/HttpServer.obj b/MFCCreoDll/x64/Debug/HttpServer.obj
index 068a9b4..2e6b7f3 100644
Binary files a/MFCCreoDll/x64/Debug/HttpServer.obj and b/MFCCreoDll/x64/Debug/HttpServer.obj differ
diff --git a/MFCCreoDll/x64/Debug/JsonHelper.obj b/MFCCreoDll/x64/Debug/JsonHelper.obj
index f23c8e6..737d35d 100644
Binary files a/MFCCreoDll/x64/Debug/JsonHelper.obj and b/MFCCreoDll/x64/Debug/JsonHelper.obj differ
diff --git a/MFCCreoDll/x64/Debug/Logger.obj b/MFCCreoDll/x64/Debug/Logger.obj
index c1d123d..d66dc31 100644
Binary files a/MFCCreoDll/x64/Debug/Logger.obj and b/MFCCreoDll/x64/Debug/Logger.obj differ
diff --git a/MFCCreoDll/x64/Debug/MFCCreoDll.obj b/MFCCreoDll/x64/Debug/MFCCreoDll.obj
index 53d331e..7c7eec8 100644
Binary files a/MFCCreoDll/x64/Debug/MFCCreoDll.obj and b/MFCCreoDll/x64/Debug/MFCCreoDll.obj differ
diff --git a/MFCCreoDll/x64/Debug/MFCCreoDll.pch b/MFCCreoDll/x64/Debug/MFCCreoDll.pch
index 3aa20b8..1db1d77 100644
Binary files a/MFCCreoDll/x64/Debug/MFCCreoDll.pch and b/MFCCreoDll/x64/Debug/MFCCreoDll.pch differ
diff --git a/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.command.1.tlog b/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.command.1.tlog
index 7fdd2a2..4a3fe9a 100644
Binary files a/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.command.1.tlog and b/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.command.1.tlog differ
diff --git a/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.write.1.tlog b/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.write.1.tlog
index 3c182ca..f379b1d 100644
Binary files a/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.write.1.tlog and b/MFCCreoDll/x64/Debug/MFCCreoDll.tlog/CL.write.1.tlog differ
diff --git a/MFCCreoDll/x64/Debug/ModelAnalyzer.obj b/MFCCreoDll/x64/Debug/ModelAnalyzer.obj
index 65a68f2..4983ed2 100644
Binary files a/MFCCreoDll/x64/Debug/ModelAnalyzer.obj and b/MFCCreoDll/x64/Debug/ModelAnalyzer.obj differ
diff --git a/MFCCreoDll/x64/Debug/ModelSearchEngine.obj b/MFCCreoDll/x64/Debug/ModelSearchEngine.obj
index 17f0611..c50de9a 100644
Binary files a/MFCCreoDll/x64/Debug/ModelSearchEngine.obj and b/MFCCreoDll/x64/Debug/ModelSearchEngine.obj differ
diff --git a/MFCCreoDll/x64/Debug/ModelSearchHandler.obj b/MFCCreoDll/x64/Debug/ModelSearchHandler.obj
index d343120..ce4cd93 100644
Binary files a/MFCCreoDll/x64/Debug/ModelSearchHandler.obj and b/MFCCreoDll/x64/Debug/ModelSearchHandler.obj differ
diff --git a/MFCCreoDll/x64/Debug/PathDeleteManager.obj b/MFCCreoDll/x64/Debug/PathDeleteManager.obj
index 63a626c..93aa633 100644
Binary files a/MFCCreoDll/x64/Debug/PathDeleteManager.obj and b/MFCCreoDll/x64/Debug/PathDeleteManager.obj differ
diff --git a/MFCCreoDll/x64/Debug/ServerManager.obj b/MFCCreoDll/x64/Debug/ServerManager.obj
index 8219189..185d0d0 100644
Binary files a/MFCCreoDll/x64/Debug/ServerManager.obj and b/MFCCreoDll/x64/Debug/ServerManager.obj differ
diff --git a/MFCCreoDll/x64/Debug/ShellExportHandler.obj b/MFCCreoDll/x64/Debug/ShellExportHandler.obj
index 71bdc0e..f25121f 100644
Binary files a/MFCCreoDll/x64/Debug/ShellExportHandler.obj and b/MFCCreoDll/x64/Debug/ShellExportHandler.obj differ
diff --git a/MFCCreoDll/x64/Debug/ShrinkwrapManager.obj b/MFCCreoDll/x64/Debug/ShrinkwrapManager.obj
index 29c7ae2..574e86b 100644
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diff --git a/MFCCreoDll/x64/Debug/WebSocketServer.obj b/MFCCreoDll/x64/Debug/WebSocketServer.obj
index f10c1d2..18ca1e6 100644
Binary files a/MFCCreoDll/x64/Debug/WebSocketServer.obj and b/MFCCreoDll/x64/Debug/WebSocketServer.obj differ
diff --git a/MFCCreoDll/x64/Debug/pch.obj b/MFCCreoDll/x64/Debug/pch.obj
index dfab2dd..aa67419 100644
Binary files a/MFCCreoDll/x64/Debug/pch.obj and b/MFCCreoDll/x64/Debug/pch.obj differ
diff --git a/MFCCreoDll/x64/Debug/vc143.idb b/MFCCreoDll/x64/Debug/vc143.idb
deleted file mode 100644
index b35be2f..0000000
Binary files a/MFCCreoDll/x64/Debug/vc143.idb and /dev/null differ
diff --git a/MFCCreoDll/x64/Debug/vc143.pdb b/MFCCreoDll/x64/Debug/vc143.pdb
index b16c86c..458a649 100644
Binary files a/MFCCreoDll/x64/Debug/vc143.pdb and b/MFCCreoDll/x64/Debug/vc143.pdb differ
diff --git a/ShrinkwrapManager.h b/ShrinkwrapManager.h
index c4e467e..340c24c 100644
--- a/ShrinkwrapManager.h
+++ b/ShrinkwrapManager.h
@@ -23,18 +23,18 @@ struct ShrinkwrapShellRequest {
     std::string project_name = "Shrinkwrap Shell Export";
     std::string method = "outer_shell";
     std::string component_path = "";              // 可选：子装配体路径，如 "TopAsm.asm/SubAsm.asm"，为空则使用当前模型
-    int quality = 8;                          // 1-10, 质量等级
+    int quality = 5;                          // 1-10, 质量等级（降低默认值避免大模型卡死）
     double chord_height = 0.1;                // 弦高控制三角化误差(mm), 0.05-0.2
-    bool fill_holes = true;                   // 自动填孔
-    bool ignore_small_surfaces = true;        // 忽略小表面
-    double small_surface_percentage = 0.5;    // 小表面百分比阈值
+    bool fill_holes = false;                  // 自动填孔（关闭以提高稳定性）
+    bool ignore_small_surfaces = false;       // 忽略小表面（关闭避免卡死）
+    double small_surface_percentage = 0.0;    // 小表面百分比阈值（设为0不过滤）
     std::string output_file_path;             // 输出文件路径
     std::string output_type = "solid_surface"; // "solid_surface" or "facet"
     bool ignore_quilts = true;                // 忽略面片
     bool ignore_skeleton = true;              // 忽略骨架
     bool assign_mass_properties = false;      // 分配质量属性
     std::string preset = "";                  // "fast", "balanced", "tight" or ""
-    int timeout_seconds = 30;                 // 超时时间(秒), 默认30秒，最大300秒
+    int timeout_seconds = 60;                 // 超时时间(秒), 默认60秒，最大300秒
 };
 
 struct ShrinkwrapShellParameters {
diff --git a/x64/Debug/MFCCreoDll.dll b/x64/Debug/MFCCreoDll.dll
index bd06d44..e6de99d 100644
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diff --git a/x64/Debug/MFCCreoDll.pdb b/x64/Debug/MFCCreoDll.pdb
index d62e4d5..0f000db 100644
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