Correct Way to train both unets

[gauravbyte]

Hello I am trying to train model on medical dataset I want to generate the images based on text I am using foll0wing script for training but apparently it does not printing training loss and valid loss and not executing sampling loop please look at script and let me know what is the issue

for i in tqdm(range(10000)):
    try:
        loss = trainer.train_step(unet_number = 1, max_batch_size = 32)
        loss = trainer.train_step(unet_number = 2, max_batch_size = 32)
        trainer.update(unet_number=1)
        trainer.update(unet_number=2)
        # trainer.update(unet_number=1)
        print(f'train loss: {loss}')
        if not(i%50):
            valid_loss = trainer.valid_step(unet_number = 1, max_batch_size = 32)
            print(f"valid loss {valid_loss}")
    
        if not (i % 100) and trainer.is_main: # is_main makes sure this can run in distributed
            images = trainer.sample(texts = ['xray of chest','mri of brain'], batch_size = 1, return_pil_images = True, stop_at_unet_number = 2)
            images[0].save(f'sample/xray-chest-{i // 100}.png')
            images[1].save(f'sample/brain-mri-{i//100}.png')
            
        if not(i%1000):
            trainer.save(f'checkpoints/checkpoint-{i//1000}.pt')
            
    except:
        continue

[xbowlove]

I encounter the same error with you. the printed info in terminal is "'you cannot only train on one unet at a time. you will need to save the trainer into a checkpoint, and resume training on a new unet' AssertionError: you cannot only train on one unet at a time. you will need to save the trainer into a checkpoint, and resume training on a new unet ". I can't understand the masssage.If someone can explain it to me, I would be very appreciated.