raidios

Hi, I've experienced the same thing on my win32 version. I wrote a script to import scene from maya. In case of missing files, I use os.path.exists() to check whether a file exists. Since it's a heavy job on my scene, it takes a long time. However, there's no critical error occured during the script's runing. But after that, it seems houdini will definitely go frozen some time, even without any more operations. Moreover, when my script creates nodes or manipulates them, houdini raises an “Invalid OpenGL driver” error, though it doesn't harm anything. I tested this script on linux64, all works smoothly. Is that a bug or should I do something differently?