As you said, I removed the electrical network. Then there's no error. Thank you all very much

Information that the electrical network is corrupted is very useful. The placement of my wire was really terrible, so it may be good to try to rework this. Thank you.

umm....This problem also occur by using an oldest autosave data. So, I have no data which the problem never happen...

I already fixed DRAM problem, but still happen...
Also I have two sub-computers, so I tried that too, but I can't save it well. Is the save data once corrupted useless...?

[1.1.74]My game crashes when I try saving
1.What did you do?
My PC crashed a few days ago, because of DRAM. After this, the problem start to occur.
2.What happened?
I can't save my data due to the crash. See log below.
—---------------------------------------------------
Factorio crashed. Generating ...