Invalid Argument error when copying data from device to host

Question

I am having problems copying data from my device back to the host. My data are arranged in a struct:

typedef struct Array2D {
    double* arr;        
    in         


        

Answer 1

This (copying device-allocated memory using cudaMemcpy) is a known limitation in CUDA 4.1. A fix is in the works and will be released in a future version of the CUDA runtime.