请教一个调试的问题(用DIRECTX8生成地形)

葡萄糖

Game.h:CTerrain* m_pTerrain1;

Game.cpp:CGame::CGame():m_pTerrain1 = NULL;

Game.cpp:CGame::~CGame():SafeDelete(m_pTerrain1);

Game.cpp:bool CGame::InitialiseGame():m_pTerrain1 = new CTerrain(m_pD3DDevice, 20, 20, 10.0, 15);m_pTerrain1->SetTexture("Grass.bmp");

Game.cpp:void CGame::Render():m_pTerrain1->Render();

Debug Error.

葡萄糖

但是当我下载了自己的附件后,运行,Debug Error又消失了,真是奇怪.