The checkpoint file (D/G_xxx.pth) didn't create

[MiranyStory]

I already trained one model for 100 epochs and it created the D_xxx.pth and G_xxx.pth.
But now I did a second one with 10 epochs, but it didn't create any of those files, so I can't resume the training (I have a weak computer and don't have time to do a long session at once). Is there any minimal number of epochs you need for a checkpoint to be created? Or is it because of another problem?