Silent error Object detection Finetuning Tutorial on CPU

Hello, I am following the object recognition tutorial from pytorch . I use Windows 10 with CPU only and I had to make a couple of tweaks to the auxiliary scripts (utils, engine) to avoid calls to cuda.
However, the following line is giving silent error when run for the 2nd time in a loop, so I guess it is a memory problem. Both in Jupyter and in the terminal, no error shown, just restarting kernel or going to next command.

coco_dt = loadRes(self.coco_gt, results) if results else COCO()

Could you check your system RAM and swap?
Could your machine be running out of memory and thus killing the process?