CUDA_ERROR_INVALID_DEVICE after playing many times videoDecodeGL

Accelerated Computing CUDA CUDA Programming and Performance
1

I loop the cudaDecodeGL example to play a list of video.
As the videos may have different format, I use loadVideoSource(), initCudaVideo() and freeCudaResoures() for each video.
After the program play for many times, the program cannot new VideoDecoder and return error message
with CUDA_ERROR_INVALID_DEVICE.

Is the problem of overheat? As some times the program can run more than 100 times but may also run for a few times and with the error of CUDA_ERROR_INVALID_DEVICE.
It doesn’t seem the problem of memory leakage. I have use memtestG80 and my GeForce GTX 660 is ok.

Thanks