Why i am getting CUDA error?

I am using matlab 2017b, Quadro P400, CUDA version 10.0. when i execute gpudevice i am getting this error. Why.? Earlier it was working fine. I dont remember my earlier CUDO version, today i upgraded to 10.

>> gpuDevice
  Error using gpuDevice (line 26)
  An unexpected error occurred during CUDA execution. The CUDA error was:
  CUDA_ERROR_UNKNOWN

[Joss Knight]

What do you mean by CUDA version 10.0? Did you install the CUDA toolkit, or the CUDA driver?

[Karthik K]

CUDA Driver 10.0. Its solved now. Its working. After update and restarting the computer.

Answer 1

[Matt J]

Did you restart the computer after your CUDA upgrade? I would try that.

[Karthik K]

Yes it worked. Thank You. But I saw your message now. Sorry.

[Matt J]

No, problem. But please Accept-click the answer to indicate that it worked.

[madhan ravi]

Answer accepted by madhan ravi since the OP didn't.

[Matt J]

Thanks!