[求助]插入图形出错

yinyan168

用下列代码可以成功插入一个ydphb.dwg图，可是关闭图纸的时候就出错。请问什么原因，谢谢

AcGeMatrix3d mat;
mat.setToIdentity();
mat.setToTranslation(AcGeVector3d(inPoint[X],inPoint[Y],inPoint[Z]));

 AcDbDatabase *pNewDb=new AcDbDatabase(Adesk::kFalse);

  CString sFileName;
  acedFindFile("ydphb.dwg",sFileName.GetBuffer());
  sFileName.ReleaseBuffer();
  es=pNewDb->readDwgFile(sFileName, _SH_DENYWR,false);
  if (es!=Acad::eOk)
  {
   acutPrintf("\nThe file %s cannot be opend!\n",sFileName);
   CompleteEditorCommand();
   acDocManager->unlockDocument(curDoc());
   return;
  }
  AcDbDatabase *pDb;
  pDb =acdbHostApplicationServices ()->workingDatabase () ;
  pDb->insert(mat, pNewDb);

MIRRO

new了一个东西之后，是不是要有个对应的处理啊？诸如delete之类的东西?