Yes my pc crashed and i restarted it. I dont know about bugs but this happened twice (Black screen, unresponsive pc).
Anyway thanks for pointing the difference between HF and the MP4 calculation. Now I know :]. I am an undergrad chem student and almost everything here is way over my head.
Well I really wanted to use Firefly for my next project with CUDA enabled, so I did some test runs which you have seen in the first message.
Thank you for pointing that (MKLNP) out