Thanks for your reply.
I found that this problem occurs at random, and sometimes it could happened when the system just started, so I don’t think the temperature could be the reason. My RAM is 64GB, I think that is enough to run the codes. I installed v1.0 at first, but I found the same codes run slower than v0.5, so I changed back to v0.5. I don’t understand the meaning of “the nightly builds”.