diff --git a/SourceCode/Code2026/CoreLibrary/AecDbEwPipeBase.cpp b/SourceCode/Code2026/CoreLibrary/AecDbEwPipeBase.cpp
index e790717..8317b37 100644
--- a/SourceCode/Code2026/CoreLibrary/AecDbEwPipeBase.cpp
+++ b/SourceCode/Code2026/CoreLibrary/AecDbEwPipeBase.cpp
@@ -1201,10 +1201,25 @@ Acad::ErrorStatus AecDbEwPipeBase::RegionAcisoutDwgOutFields(AcDbDwgFiler* pFile
 	//避免多文档crash：文件名带进程号，同一张图在两个 CAD 实例里同时打开不会互相覆盖
 	TCHAR szHandleStr[19];
 	memset(szHandleStr,0,sizeof(szHandleStr) );
-	objectId().handle().getIntoAsciiBuffer(szHandleStr);
+
+	CString sTag;
+	AcDbObjectId idSelf = objectId();
+	if (!idSelf.isNull())
+		idSelf.handle().getIntoAsciiBuffer(szHandleStr);
+
+	if (szHandleStr[0] != _T('\0'))
+	{
+		sTag = szHandleStr;
+	}
+	else
+	{
+		// 未入库实体（剪贴板、临时序列化）没有句柄，用进程内递增序号保证文件名唯一
+		static LONG s_nTempSeq = 0;
+		sTag.Format(_T("N%ld"),(long)::InterlockedIncrement(&s_nTempSeq));
+	}
 
 	CString sFileName;
-	sFileName.Format(_T("Region_%lu_%s.dat"),(unsigned long)::GetCurrentProcessId(),szHandleStr);
+	sFileName.Format(_T("Region_%lu_%s.dat"),(unsigned long)::GetCurrentProcessId(),(LPCTSTR)sTag);
 
 	CString sFullPath = FilePath::getSystemTemporaryFolder();
 	sFullPath += _T("\\");
@@ -1216,7 +1231,7 @@ Acad::ErrorStatus AecDbEwPipeBase::RegionAcisoutDwgOutFields(AcDbDwgFiler* pFile
 	Acad::ErrorStatus es = AcDbBody::acisOut(sFullPath, arBodyPtrs);
 	if (Acad::eOk != es)
 	{
-		acutPrintf(_T("\nAecDbEwPipeBase: 截面 acisOut 失败，handle=%s，err=%d，改用原生写法。"),szHandleStr,es);
+		acutPrintf(_T("\nAecDbEwPipeBase: 截面 acisOut 失败，tag=%s，err=%d，改用原生写法。"),(LPCTSTR)sTag,es);
 		::DeleteFile(sFullPath);
 		return WriteRegionNativeFallback(pFiler, m_pRegion);
 	}
@@ -1224,7 +1239,7 @@ Acad::ErrorStatus AecDbEwPipeBase::RegionAcisoutDwgOutFields(AcDbDwgFiler* pFile
 	CFile file;
 	if (!file.Open(sFullPath, CFile::modeRead))
 	{
-		acutPrintf(_T("\nAecDbEwPipeBase: 截面临时文件打开失败，handle=%s，改用原生写法。"),szHandleStr);
+		acutPrintf(_T("\nAecDbEwPipeBase: 截面临时文件打开失败，tag=%s，改用原生写法。"),(LPCTSTR)sTag);
 		::DeleteFile(sFullPath);
 		return WriteRegionNativeFallback(pFiler, m_pRegion);
 	}
@@ -1243,8 +1258,8 @@ Acad::ErrorStatus AecDbEwPipeBase::RegionAcisoutDwgOutFields(AcDbDwgFiler* pFile
 	if (nLen == 0 || nRead != nLen)
 	{
 		// 空文件或短读：尾部是未初始化内存，不能写进 DWG
-		acutPrintf(_T("\nAecDbEwPipeBase: 截面临时文件异常，handle=%s，期望%u字节实读%u字节，改用原生写法。")
-			,szHandleStr,nLen,nRead);
+		acutPrintf(_T("\nAecDbEwPipeBase: 截面临时文件异常，tag=%s，期望%u字节实读%u字节，改用原生写法。")
+			,(LPCTSTR)sTag,nLen,nRead);
 		::DeleteFile(sFullPath);
 		delete[] pszTxt;
 		return WriteRegionNativeFallback(pFiler, m_pRegion);