I face an error when I tried to use DAT upscalers in Automatic1111, that said: TypeError: argument of type ‘NoneType’ is not iterable. I checked what is going on and figured out, so here you can find the steps to fix it…

Long story short. DAT team changed their repo to the new location, so you can’t download anymore the upscalers from

• https://raw.githubusercontent.com/n0kovo/dat_upscaler_models/main/DAT/DAT_x2.pth

Clarification and steps to fix can be found in AUTOMATIC1111 github, here is related issue

• https://github.com/AUTOMATIC1111/stable-diffusion-webui/issues/16015

Steps to fix

First of all go to your models dir and change extension or copy the old files from

• \automatic1111\webui\models\DAT\

Most likely the will have small size, smth like 165 byte and if you open them in notepad they will contain smth like.

If it so, then you can just delete them.

Now go to zhengchen1999 github and download the models into same folder

• https://github.com/zhengchen1999/DAT?tab=readme-ov-file#models

That’s all. Reboot your AUTOMATIC1111 and then you can use it.

Full error text

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*** Error completing request
*** Arguments: (‘task(d3jzszi0hesmjpn)’, 0.0, , None, ”, ”, True, True, 0.0, 1.5, 0.0, 512, 512, True, ‘DAT x2’, ‘None’, 0, False, 0.419, False, 1, 0, False, 0.5, 0.2, False, 0.9, 0.15, 0.5, False, False, 384, 768, 4096, 409600, ‘Maximize area’, 0.1, False, [‘Horizontal’], False, [‘Deepbooru’], False, ‘None’, False, False, 240, 10, 10) {}
Traceback (most recent call last):
File “D:\AI\automatic1111\webui\modules\call_queue.py”, line 74, in f
res = list(func(*args, *kwargs)) File “D:\AI\automatic1111\webui\modules\call_queue.py”, line 53, in f res = func(args, *kwargs) File “D:\AI\automatic1111\webui\modules\call_queue.py”, line 37, in f res = func(args, *kwargs) File “D:\AI\automatic1111\webui\modules\postprocessing.py”, line 133, in run_postprocessing_webui return run_postprocessing(args, **kwargs)
File “D:\AI\automatic1111\webui\modules\postprocessing.py”, line 73, in run_postprocessing
scripts.scripts_postproc.run(initial_pp, args)
File “D:\AI\automatic1111\webui\modules\scripts_postprocessing.py”, line 198, in run
script.process(single_image, **process_args)
File “D:\AI\automatic1111\webui\scripts\postprocessing_upscale.py”, line 152, in process
upscaled_image = self.upscale(pp.image, pp.info, upscaler1, upscale_mode, upscale_by, max_side_length, upscale_to_width, upscale_to_height, upscale_crop)
File “D:\AI\automatic1111\webui\scripts\postprocessing_upscale.py”, line 107, in upscale
image = upscaler.scaler.upscale(image, upscale_by, upscaler.data_path)
File “D:\AI\automatic1111\webui\modules\upscaler.py”, line 68, in upscale
img = self.do_upscale(img, selected_model)
File “D:\AI\automatic1111\webui\modules\dat_model.py”, line 32, in do_upscale
model_descriptor = modelloader.load_spandrel_model(
File “D:\AI\automatic1111\webui\modules\modelloader.py”, line 177, in load_spandrel_model
model_descriptor = spandrel.ModelLoader(device=device).load_from_file(str(path))
File “D:\AI\automatic1111\system\python\lib\site-packages\spandrel__helpers\loader.py”, line 43, in load_from_file
state_dict = self.load_state_dict_from_file(path)
File “D:\AI\automatic1111\system\python\lib\site-packages\spandrel__helpers\loader.py”, line 85, in load_state_dict_from_file
return canonicalize_state_dict(state_dict)
File “D:\AI\automatic1111\system\python\lib\site-packages\spandrel__helpers\canonicalize.py”, line 35, in canonicalize_state_dict
if unwrap_key in state_dict and isinstance(state_dict[unwrap_key], dict):
TypeError: argument of type ‘NoneType’ is not iterable

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