Gcc error: No such file or directory

Hello I’m new user. And I have an Fedora 23. I try to run a file with a command: nvcc -o divergence_test.out 3_warp_divergence.cu
But I have this error:
gcc: error: 3_warp_divergence.cu: No such file or directory
gcc: warning: ‘-x c++’ after last input file has no effect
gcc: fatal error: no input files.

What I’m doing wrong?