CUDA error message : unspecified launch failure

Posted by user1297065 on Stack Overflow See other posts from Stack Overflow or by user1297065
Published on 2012-03-28T05:23:50Z Indexed on 2012/03/28 5:29 UTC
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I received the error message "unspecified launch failure" in following part.

off_t *matches_position;
......
cudaMalloc ( (void **) &mat_position, sizeof(off_t)*10);
......
cudaMemcpy (mat_position, matches_position, sizeof(off_t)*10, cudaMemcpyHostToDevice );
......
err=cudaMemcpy (matches_position, mat_position, sizeof(off_t)*10, cudaMemcpyDeviceToHost );
if(err!=cudaSuccess)
{
  printf("\n3 %s\n", cudaGetErrorString(err));
}

Do you know why this error message is reported??

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