- unable to initialize heap - unable to open console device Error 1: Diablo II is unable to proceed. Please run D2VidTst and try again. Error 21: A critical error has occurred while initializing windowed mode. Error 22: A critical error has occurred while initializing DirectDraw. Error 23: A critical error has occurred while initializing Glide. Error 24: A critical error has occurred while initializing OpenGL. Error 25: A critical error has occurred while initializing Direct3D. Error interfacing with Gfx DLL #%i Runtime error