cuvidGetDecoderCaps can`t found in, cuda version is 375.20

i complie the example of video sdk and run example named NvTransend, and the system note me that
Failed to find required function “cuvidGetDecoderCaps” in
cuvidInit(0) has returned CUDA error 999

I’m same problem cuvidGetDecoderCaps which has not load as symbol in nvcuvid.dll.
And it makes exception happen with cuvidCtxLock(), is skipped load owe to above error.
cuda version 385.XX?, 2018 07 is latest version is suspicious.
I installed cuda version 411.63 is no problem.