Launch Error? Missing xtransformers

[jasonmbrown]

ModuleNotFoundError: import of xformers halted; None in sys.modules

Device: cuda:0 Tesla P40 : native
VAE dtype: torch.float32
Traceback (most recent call last):
File "/opt/stable-diffusion-webui-forge/launch.py", line 48, in
main()
File "/opt/stable-diffusion-webui-forge/launch.py", line 44, in main
start()
File "/opt/stable-diffusion-webui-forge/modules/launch_utils.py", line 508, in start
import webui
File "/opt/stable-diffusion-webui-forge/webui.py", line 17, in
initialize.imports()
File "/opt/stable-diffusion-webui-forge/modules/initialize.py", line 53, in imports
from modules import processing, gradio_extensons, ui # noqa: F401
File "/opt/stable-diffusion-webui-forge/modules/processing.py", line 18, in
import modules.sd_hijack
File "/opt/stable-diffusion-webui-forge/modules/sd_hijack.py", line 5, in
from modules import devices, sd_hijack_optimizations, shared, script_callbacks, errors, sd_unet, patches
File "/opt/stable-diffusion-webui-forge/modules/sd_hijack_optimizations.py", line 13, in
from modules.hypernetworks import hypernetwork
File "/opt/stable-diffusion-webui-forge/modules/hypernetworks/hypernetwork.py", line 13, in
from modules import devices, sd_models, shared, sd_samplers, hashes, sd_hijack_checkpoint, errors
File "/opt/stable-diffusion-webui-forge/modules/sd_models.py", line 21, in
from modules_forge import forge_loader
File "/opt/stable-diffusion-webui-forge/modules_forge/forge_loader.py", line 5, in
from ldm_patched.modules import model_detection
File "/opt/stable-diffusion-webui-forge/ldm_patched/modules/model_detection.py", line 1, in
import ldm_patched.modules.supported_models
File "/opt/stable-diffusion-webui-forge/ldm_patched/modules/supported_models.py", line 2, in
from . import model_base
File "/opt/stable-diffusion-webui-forge/ldm_patched/modules/model_base.py", line 2, in
from ldm_patched.ldm.modules.diffusionmodules.openaimodel import UNetModel, Timestep
File "/opt/stable-diffusion-webui-forge/ldm_patched/ldm/modules/diffusionmodules/openaimodel.py", line 15, in
from ..attention import SpatialTransformer, SpatialVideoTransformer, default
File "/opt/stable-diffusion-webui-forge/ldm_patched/ldm/modules/attention.py", line 14, in
import xformers
ModuleNotFoundError: import of xformers halted; None in sys.modules
2024-10-05 02:46:14,689 INFO exited: forge (exit status 1; not expected)

Just wondering if anyone knows how to fix this issue?

Edit: I fixed it by adding --xformers

[s-KaiNet]

Could you tell where to add --xformers? Basically having the same problem.

[s-KaiNet]

UPD: Added COMMANDLINE_ARGS=--xformers to env. vars and it also worked for me.

[gltai06]

In which file should I add the "--xformers" parameter?