RuntimeError: Sizes of tensors must match except in dimension 1. Expected size 16 but got size 15 for tensor number 1 in the list.

[zesameri]

(my code)
samples = sampler.decode(z_enc, c, t_enc, unconditional_guidance_scale=opt.scale)
stack trace w/o pytorch forward and grad calls
File "/home/model-server/stable-diffusion/ldm/models/diffusion/ddim.py", line 238, in decode
x_dec, _ = self.p_sample_ddim(x_dec, cond, ts, index=index, use_original_steps=use_original_steps)
File "/home/model-server/stable-diffusion/ldm/models/diffusion/ddim.py", line 177, in p_sample_ddim
e_t_uncond, e_t = self.model.apply_model(x_in, t_in, c_in).chunk(2)
File "/home/model-server/stable-diffusion/ldm/models/diffusion/ddpm.py", line 987, in apply_model
x_recon = self.model(x_noisy, t, **cond)
File "/home/model-server/stable-diffusion/ldm/models/diffusion/ddpm.py", line 1410, in forward
out = self.diffusion_model(x, t, context=cc)
File "/home/model-server/stable-diffusion/ldm/modules/diffusionmodules/openaimodel.py", line 736, in forward
h = th.cat([h, hs.pop()], dim=1)
RuntimeError: Sizes of tensors must match except in dimension 1. Expected size 16 but got size 15 for tensor number 1 in the list.

[smoran]

Make sure the size if the width/height is a 64 step (512, 576, 640...)

[ThisNekoGuy]

Why should the size / aspect ratio of the image be compromised...?

[acharb]

not sure if still relevant but I was also getting a similar error: Sizes of tensors must match except in dimension 1. Expected size 12 but got size 2 for tensor number 1 in the list

and it was due to prompt being passed to my pipe call() being an array of strings instead of a single string. Eg:

images = pipe(
    prompt=prompt, # needs to be a single string
    num_images_per_prompt=args.number,  # create multiple images with this arg
    image=image_person,
    mask_image=image_mask,
    guidance_scale=7.5,
    generator=generator,
).images

[sunyuhan19981208]

Make sure the size if the width/height is a 64 step (512, 576, 640...)

you are really wise man

[slashyyy46543]

Make sure the size if the width/height is a 64 step (512, 576, 640...)

how do i do that?

[smoran]

Make sure the size if the width/height is a 64 step (512, 576, 640...)

how do i do that?

In the pipe, pass width=XXX and height=YYY

[lucas-zimerman]

Make sure the size if the width/height is a 64 step (512, 576, 640...)

your comment should be the actual error message lol

[sivannavis]

Does it have to be 64? I tried 32 and it worked. What's the reason for this number?

[smoran]

Multiplications of 8 usually work, but i would stick to 64/128 etc. it is also advised to keep the total size close to the original resolution, so don't use 1024 by 512 on a 512 by 512 model for example as it might introduce artifacts.

…

On Sun, Jun 16, 2024, 9:28 PM Sivan Ding ***@***.***> wrote: Does it have to be 64? I tried 32 and it worked. What's the reason for this number? — Reply to this email directly, view it on GitHub <#301 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABITHJHLVFSLJHD2OTV4GYDZHXKLBAVCNFSM6AAAAAAQQK46VGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCNZRHAYDAMRSGM> . You are receiving this because you commented.Message ID: ***@***.***>

[ProgrammingLife]

In my case the issue was caused by another reason. I was using SD 1.5 as for model but SDXL as for controlnet model. So I change my base model to SDXL as well and all worked like a charm.