No gradients for any parameters

[antonioo-c]

Greak work! But i have a problem when finetuning the model. I added the following code in main/trainer.py file, trying to inspect the gradients for the dynamicrafter model when fintuning on my own dataset, but i see all None gradient for every parameters in the model, why is that happenning?

 class PrintGradientsCallback(pl.Callback):
        def on_after_backward(self, trainer, pl_module):
            print("Gradients after backward pass:")
            for name, param in pl_module.named_parameters():
                if param.grad is not None:
                    print(f"Gradient of {name}: {param.grad.norm()}")
    trainer_kwargs["callbacks"].append(PrintGradientsCallback())