I keep getting this error any ideas?

: "unspecified launch failure"
09:09:08 CUDA: Device: 0 Thread exited with message: "unspecified launch failure"
09:09:08 CUDA: Device: 1 Thread exited with message: "unspecified launch failure"
09:09:08 CUDA: Device: 3 Thread exited with message: "unspecified launch failure"
09:09:08 CUDA: Device: 4 Thread exited with message: "all CUDA-capable devices are busy or unavailable"
09:09:08 CUDA: Device: 5 Thread exited with message: "all CUDA-capable devices are busy or unavailable"