cudamemcpy error codes

I have a problrm for cudamemcpy function on H2D. I checked the return error codes, the error code was 11. But I didn’t find any docs dersribing the meaning of the error codes. Anybody can help?

A short description of the CUDA runtime error codes can be found in the online documentation.

To convert CUDA runtime error codes into an error string, call cudaGetErrorString() with the cudaError_t status.

It helps. Thank you, njuffa.